Applied sciences

Archives of Mining Sciences

Content

Archives of Mining Sciences | 2021 | vol. 66 | No 3 |

Download PDF Download RIS Download Bibtex

Abstract

As one of the most important decision-making problems in fully mechanised mining, the corresponding mining technology pattern is the technical foundation of the working face. Characterised by complexity in a thin seam fully mechanised mining system, there are different kinds of patterns. In this paper, the classification strategy of the patterns in China is put forward. Moreover, the corresponding theoretical model using neural networks applied for patterns decision-making is designed. Based on the above, optimal selection of these patterns under given conditions is achieved. Lastly, the phased implementation plan for automatic mining pattern is designed. As a result of the industrial test, automatic mining for panel 22204 in Guoerzhuang Coal Mine is realised.
Go to article

Bibliography

[1] Li Jianmin, Yan Qingyou, Zhou Zhipo, Application status and development of coal mining technology in China. Coal Science and Technology (10), 55-60 (2012). DOI: https://doi.org/10.13199/j.cst.2012.10.61.lijm.023
[2] Zhao, T., et al., An innovative approach to thin coal seam mining of complex geological conditions by pressure regulation. International Journal of Rock Mechanics and Mining Sciences 71, 249-257 (2014). DOI: https://doi.org/10.1016/j.ijrmms.2014.05.021
[3] Yuan Liang, Research on mining technology and equipment for thin coal seams. Coal Mining (03), 15-18+42 (2011). DOI: https://doi.org/10.13532/j.cnki.cn11-3677/td.2011.03.008349
[4] Satar Mahdevari, Kourosh Shahriar, Mostafa Sharifzadeh, et al. Stability prediction of gate roadways in longwall mining using artificial neural networks 28 (11), 3537-3555 (2017). DOI: https://doi.org/10.1007/s00521-016-2263-2
[5] W. Chen, et al., Optimal Selection of a Longwall Mining Method for a Thin Coal Seam Working Face. Arabian Journal for Science and Engineering 41 (9), 3771-3781(2016). DOI: https://doi.org/10.1007/s13369-016-2260-x
[6] W. Chen PhD thesis, Key technology and decision support system for longwall fully mechanized mining in thin coal seams, China University of Mining and Technology, Xu Zhou, China (2016).
[7] B. Zhang, A. Li, Automated technology research on fully mechanized mining of thin coal seams. Advanced Materials Research 774-776, 1453-1457 (2013). DOI: https://doi.org/10.4028/www.scientific.net/AMR.774-776.1453
[8] D. Shang, et al., Research on Kinematics Joint Type Mobile Robot Platform for Thin Coal Seam Inspection. Applied Mechanics and Materials 651-653, 818-821 (2014). DOI: https://doi.org/10.4028/www.scientific.net/AMM.651-653.818
[9] J. Ralston, et al., Sensing for advancing mining automation capability: A review of underground automation technology development. International Journal of Mining Science and Technology 24 (3), 305-310 (2014). DOI: https://doi.org/10.1016/j.ijmst.2014.03.003.
[10] C. Wang, S. Tu, Selection of an Appropriate Mechanized Mining Technical Process for Thin Coal Seam Mining. Mathematical Problems in Engineering (893232), 1-10 (2015). DOI: https://doi.org/10.1155/2015/893232
[11] P athegama G. Ranjith, Jian Zhao, Minghe Ju, et al. Opportunities and Challenges in Deep Mining: A Brief Review 3 (4), 546-551 (2017). DOI: https://doi.org/10.1016/J.ENG.2017.04.024
[12] Chen Wei, PhD thesis, Research on comprehensive evaluation model of coal mine safety based on neural network, Capital University of Economics and Business, Bei Jing, China (2010).
[13] Xiaofeng Li, Suying Xiang, Pengfei Zhu, et al. Establishing a Dynamic Self-Adaptation Learning Algorithm of the BP Neural Network and Its Applications. 25(14), (2015). DOI: https://doi.org/10.1142/S0218127415400301
[14] M. Madhiarasan, S.N. Deepa. Comparative analysis on hidden neurons estimation in multi layer perceptron neural networks for wind speed forecasting 48 (4), 449-471 (2017). DOI: https://doi.org/10.1007/s10462-016-9506-6
[15] N amig J. Guliyev, E Vugar. Ismailov. Approximation capability of two hidden layer feedforward neural networks with fixed weights (2018). DOI: https://doi.org/10.1016/j.neucom.2018.07.075
[16] B. Yilmaz, M. Dagdeviren, A combined approach for equipment selection: F-PROMETHEE method and zero-one goal programming. Expert Systems with Applications 38 (9), 11641-11650 (2011). DOI: https://doi.org/10.1016/j.eswa.2011.03.043
[17] Daming Yang, Bingjing Li. The Main Adjustment of New Version China’s “Coal Mine Safety Regulations”. International Journal of Oil, Gas and Coal Engineering 7 (2) (2019). DOI: https://doi.org/10.11648/j.ogce.20190702.14
[18] Liu Shouqiang, Wu Qiang, Zeng Yifan. Analysis of revision points of detailed rules for water prevention and control in coal mines. Coal Engineering 51 (03), 1-4 (2019). DOI: https://doi.org/10.11799/ce201903001
[19] R.U. Bilsel, G. Büyüközkan, D. Ruan, A fuzzy preference‐ranking model for a quality evaluation of hospital web sites. International Journal of Intelligent Systems 21 (11), 1181-1197 (2006). DOI : https://doi.org/10.1002/int.20177
[20] R .R. Yager, A procedure for ordering fuzzy subsets of the unit interval. Information Sciences 24 (2): p. 143-161 (1981). DOI: https://doi.org/10.1016/0020-0255(81)90017-7
[21] Yang Qian, Improvement of BP neural network prediction method and its application in long-term settlement prediction of tunnels. Journal of Beijing University of Technology. (01), 92-97 (2011). DOI: CNKI: SUN: BJGD.0.2011-01-016
[22] K. Saito, R. Nakano, Extracting regression rules from neural networks. Neural Networks 15 (PII S0893- 6080(02)00089-810), 1279-1288 (2002). DOI: https://doi.org/10.1016/S0893-6080(02)00089-8
[23] Zhang Dongsheng, Zhang Jixiong, Zhang Xianchen, Fuzzy comprehensive evaluation of mining process conditions of coal seam geological conditions in working face. Journal of Systems Engineering (03), 252-256 (2002). DOI: https://doi.org/10.3969/j.issn.1000-5781.2002.03.011
[24] Zhang Lijun, Zhang Le, Comprehensive Evaluation of Adaptability of Thin Coal Seam Fully Mechanized Mining Technology. Coal Science and Technology (06), 43-45 (2006). DOI: https://doi.org/10.13199/j.cst.2006.06.53.zhanglj.016
[25] C. Wang, S. Tian, Evolving Neural Network Using Genetic Algorithm for Prediction of Longwall Mining Method in Thin Coal Seam Working Face. International Journal of Mining and Mineral Engineering 9 (3), 228-239 (2018). DOI: https://doi.org/10.1504/IJMME.2018.096121
Go to article

Authors and Affiliations

Chen Wang
1 2
ORCID: ORCID
Yu Zhang
1
ORCID: ORCID
Yong Liu
1
ORCID: ORCID
Chengyu Jiang
1
ORCID: ORCID
Mingqing Zhang
1
ORCID: ORCID

  1. Guizhou University, Mining College, Guiyang 550025, China
  2. Chongqing Energy Investment Group Science & Technology co., LTD, Chongqing 400060, China
Download PDF Download RIS Download Bibtex

Abstract

The structure and load characteristics of the roadway are simplified, and the experimental model of the roadway deformation and damage under compression-shear load is established. The experimental data acquisition system is built with a CCD camera. The digital speckle correlation method is used to calculate the image data of the experimental model. The correspondence between the evolution law of the deformation field, the interlayer displacement and deformation evolution are analysed, including the dynamic characteristic of the roadway surrounding the rock. Research results indicate: (1) The damage peak load of the weak layer structure shows a decreasing trend as the interlayer shear stress increases. As the initially applied shear stress increases, the value of interlayer sliding displacement increases, and the dynamic characteristics become more apparent. (2) In the sub-instability phase of the loading curve, when the surrounding rock slides along the layers under compression-shear load, the stress is re-distributed and transmitted to the deep part of the surrounding rock. Then the surrounding rock of the roadway forms the characteristic of alternating change, between tension to compression. (3) According to the state of dynamic and static mechanics, the deformation evolution of the roadway before the peak load belongs to the static process. Zonal fracturing is part of the transition phase from the static process to the slow dynamic process, and the rockburst damage is a high-speed dynamic process. (4) Under the compression-shear load, due to the weak layer structure of the coal and rock mass, the local fracture, damage, instability and sliding of the surrounding rock of the roadway are the mechanical causes of rockburst. (5) Even if the coal and rock mass does not have the condition of impact tendency, under stress load of the horizontal direction, distribution of large shear stress is formed between layers, and the dynamic damage of the rockburst may occur.
Go to article

Bibliography

[1] H. Lippman, The Mechanics of “Protruding” in Coal Mine: Discussion on The Violent Deformation on Both Sides of The Channel in Coal Seam [J], Advances in Mechanics 19 (2), 100-113+59 (1989). DOI: https://doi.org/10.6052/1000-0992-1989-1-j1989-011
[2] H.T. Li, J. Liu, S.K. Zhao, L.S. Cai, Q.X. Qi, L.H. Kong, Experimental Study on The Development Mechanism of Coal Bump Considering The Clamping Effect of Roof and Floor [J], Journal of China Coal Society 43 (11), 2951-2958 (2018). DOI: CNKI:SUN:MTXB.0.2018-11-001
[3] M.V. Kurlenya, V.N. Oparin, V.I. Vostrikov, Effect of Anomalously Low Friction in Block Media [J], Journal of Applied Mechanics & Technical Physics 40 (6), 1116-1120 (1999). DOI: https://doi.org/10.1007/BF02469182
[4] L .M. Dou, H. He, J. He, Z.Y. Wang, New Method of Rock Burst Risk Assessment Using Relative Stress Concentration Factor Superposition [J], Journal of China Coal Society 43 (2), 327-332 (2018). DOI: CNKI:SUN:MTXB.0.2018-02-004
[5] L .P. Li, W.J. Li, Y.S. Pan, Influence of Impact Disturbance on Anomalously Low Friction Rock Bursts [J], Chinese Journal of Rock Mechanics and Engineering, 38 (1), 111-120 (2019). DOI: https://doi.org/10.13722/j.cnki.jrme.2018.0922
[6] L .Y. Pan, H.Z. Yang, Dilatancy Theory for Identification of Premonitory Information of Rock Burst [J], Chinese Journal of Rock Mechanics and Engineering 23 (1), 4528-4530 (2004). DOI: https://doi.org/10.3321/j.issn:1000-6915.2004.z1.056
[7] Q.X. Qi, T.Q. Liu, Y.W. Shi, J.L. Lv, Mechanism of Friction Sliding Instability of Rock Burst [J], Ground Pressure and Strata Control 1, 174-177+200 (1995). DOI: CNKI:SUN:KSYL.0.1995-Z1-042
[8] Q.X. Qi, Y.W. Shi, T.Q. Liu, Mechanism of Instability Caused by Viscous Sliding in Rock Burst [J], Journal of China Coal Society 22 (2), 144-148 (1997). DOI: CNKI:SUN:MTXB.0.1997-02-006
[9] Q.X. Qi, Z.Z. Gao, S. Wang, The Theory of Rock Burst Led by Structure Damage of Bedded Coal-rock Mass [J], Coal Mining Technology (2), 14-17+64 (1998). DOI: CNKI:SUN:MKKC.0.1998-02-004
[10] E.I. Shemyakin, G.L. Fisenko, M.V. Kurlenya, V.N. Oparin, Y.S. Kuznetsov, Zonal Disintegration of Rocks around Underground Work, Part I:Data of In-situ Observations [J], Journal of Mining Science 22 (3), 157-168 (1986). DOI: https://doi.org/10.1007/BF02500863368
[11] E.I. Shemyakin, G.L. Fisenko, M.V. Kurlenya, V.N. Oparin, V.N. Reva, F.P. Glushikhin, M.A. Rozenbaum, E.A. Tropp, Y.S. Kuznetsov, Zonal Disintegration of Rocks around Underground Work, Part II: Rock Fracture Simulated in Equivalent Materials [J], Journal of Mining Science 22 (4), 223-232 (1986). DOI: https://doi.org/10.1007/BF02500845
[12] E.I. Shemyakin, G.L. Fisenko, M.V. Kurlenya, V.N. Oparin, Y.S. Kuznetsov, Zonal Disintegration of Rocks around Underground Workings, Part III: Theoretical Concepts [J], Journal of Mining Science 23 (1), 1-6 (1987). DOI: https://doi.org/10.1007/BF02534034
[13] E.I. Shemyakin, M.V. Kurlenya, V.N. Oparin, V.N. Reva, F.P. Glushikhin, E.A. Tropp, Zonal Disintegration of Rocks around Underground Workings, Part IV: Practical Applications [J], Journal of Mining Science 25 (4), 297- 302 (1989). DOI: https://doi.org/10.1007/BF02528546
[14] W.Q. Guo, S.P. Ma, Y.J. Kang, Q.W. Ma, Virtual Extensometer Based on Digital Speckle Correlation Method and Its Application to Deformation Field Evolution of Rock Specimen [J], Rock and Soil Mechanics 32 (10), 3196- 3200 (2011). DOI: https://doi.org/10.16285/j.rsm.2011.10.030
[15] X.T. Zhang, Q.Y. Zhang, W. Xiang, Q. Gao, S.B. Yuan, C. Wang, Model Test Study of Zonal Disintegration in Deep Layered Jointed Rock Mass [J], Rock and Soil Mechanics 35 (8), 2247-2254 (2014). DOI: CNKI:SUN:YTLX.0.2014-08-018
[16] Y. Xu, P. Yuan, Model Test of Zonal Disintegration in Deep Rock under Blasting Load [J], Chinese Journal of Rock Mechanics and Engineering 34 (S2), 3844-3851 (2015). DOI: CNKI:SUN:YSLX.0.2015-S2-027
[17] Y.M. Song, Z.X. Zhao, L.L. Deng, J.N. Wu, Deformation Field and Acoustic Emission Characteristics of Marble during Sub-instability Stage [J], Journal of Liaoning Technical University 37 (3), 541-546 (2018). DOI: CNKI:SUN:FXKY.0.2018-03-016
[18] Y.S. Pan, K.X. Wang, Pendulum-type Waves Theory on The Mechanism of Anomalously Low Friction between Rock Masses [J], Seismology and Geology 36 (3), 833-844 (2014). DOI: https://doi.org/10.3969/j.issn.0253-4967.2014.03.022
[19] Y.S. Pan, Y.H. Xiao, Z.H. Li, K.X. Wang, Study of Roadway Support Theory of Rock Burst in Coal Mine and Its Application [J], Journal of China Coal Society 39 (2), 222-228 (2014). DOI: https://doi.org/10.13225/j.cnki.jccs.2013.2015
[20] Z.L. Fang, Study on The Ground Pressure and Control Method for Openings in Soft and Broken Rocks in Jin Chuon Mine No. 2 [J]. Journal of Beijing Iron and Steel Institute (1), 1-20 (1984). DOI: CNKI:SUN:BJKD.0.1984-01-000
Go to article

Authors and Affiliations

Yimin Song
1
He Ren
1
Hailiang Xu
1
Dong An
1

  1. North China University of Technology, School of Civil Engineering, China
Download PDF Download RIS Download Bibtex

Abstract

UAV technology is being applied for DSM generation in open-pit mines with a well-established fact that the precision of such DSM is improved by increasing the number of Ground Control Points (GCPs). However, DSMs are updated frequently in an open-pit mine where the surface is excavated continuously. This imposes a challenge to arrange and maintain the GCPs in the field. Therefore, an optimal number of GCPs should be determined to obtain sufficiently accurate DSMs while maintaining safety, time, and cost-effectiveness in the project. This study investigates the influence of the numbers of GCPs and their network configuration in the Long Son quarry, Vietnam. The analysis involved DSMs generated from eight cases with a total of 18 GCPs and each having five network configurations. The inter-case and intra-case accuracy of DSMs is assessed based on RMSEXY, RMSEZ, and RMSEXYZ. The results show that for a small- or medium-sized open-pit mine having an area of approximately 36 hectares, five GCPs are sufficient to achieve an overall accuracy of less than 10 cm. It is further shown that the optimal choice of the number of GCPs for DSM generation in such a mining site is seven due to a significant improvement in accuracy (<3.5 cm) and a decrease in configuration dependency compared to the five GCPs.
Go to article

Bibliography


[1] B. Kršák, P. Blišťan, A. Pauliková, P. Puškárová, Ľ. Kovanič, J. Palková, V. Zelizňaková, Use of low-cost UAV photogrammetry to analyze the accuracy of a digital elevation model in a case study. Measurement 91, 276-287 (2016). DOI: https://doi.org/10.1016/j.measurement.2016.05.028
[2] C . Cryderman, S.B. Mah, A. Shufletoski, Evaluation of UAV Photogrammetric Accuracy for Mapping and Earthworks Computations. GEOMATICA 68, 309-317 (2014). DOI: https://doi.org/10.5623/cig2014-405
[3] C . Hugenholtz, O. Brown, J. Walker, T. Barchyn, P. Nesbit, M. Kucharvzyk, S. Myshak, Spatial accuracy of UAVderived orthoimagery and topography: comparing photogrammetric models processed with direct geo-referencing and ground control points. GEOMATICA 70, 21-30 (2016). DOI: https://doi.org/10.5623/cig2016-102
[4] D. Tien Bui, N.Q. Long, X.-N. Bui, V.-N. Nguyen, C. Van Pham, C. Van Le, P.-T.T. Ngo, D. Tien Bui, B. Kristoffersen, Lightweight Unmanned Aerial Vehicle and Structure-from-Motion Photogrammetry for Generating Digital Surface Model for Open-Pit Coal Mine Area and Its Accuracy Assessment, in: D. Tien Bui, A. Ngoc Do, H.-B. Bui, N.-D. Hoang, (eds.), Advances and Applications in Geospatial Technology and Earth Resources, Springer International Publishing, Cham, 17-33 (2018). DOI: https://doi.org/10.1007/978-3-319-68240-2_2
[5] F . Agüera-Vega, F. Carvajal-Ramírez, P. Martínez-Carricondo, Accuracy of Digital Surface Models and Orthophotos Derived from Unmanned Aerial Vehicle Photogrammetry. J. Surv. Eng. 143, 04016025 (2017). DOI: https://doi.org/10.1061/(ASCE)SU.1943-5428.0000206
[6] F . Beretta, H. Shibata, R. Cordova, R. de L. Peroni, J. Azambuja, J.F.C.L. Costa, Topographic modelling using UAVs compared with traditional survey methods in mining. REM, Int. Eng. J. 71, 463-470 (2018). DOI: https://doi.org/10.1590/0370-44672017710074
[7] F . Mancini, M. Dubbini, M. Gattelli, F. Stecchi, S. Fabbri, G. Gabbianelli, Using Unmanned Aerial Vehicles (UAV) for High-Resolution Reconstruction of Topography: The Structure from Motion Approach on Coastal Environments. Remote Sensing 5, 6880-6898 (2013). DOI: https://doi.org/10.3390/rs5126880
[8] G . Esposito, G. Mastrorocco, R. Salvini, M. Oliveti, P. Starita, Application of UAV photogrammetry for the multitemporal estimation of surface extent and volumetric excavation in the Sa Pigada Bianca open-pit mine, Sardinia, Italy. Environ. Earth Sci. 76, 103 (2017). DOI: https://doi.org/10.1007/s12665-017-6409-z
[9] G . Forlani, E. Dall’Asta, F. Diotri, U.M. di Cella, R. Roncella, M. Santise, Quality assessment of DSMs produced from UAV flights geo-referenced with onboard RTK positioning. Remote Sensing 10, 311 (2018). DOI: https://doi.org/10.3390/rs10020311
[10] J. Fernández-Lozano, A. González-Díez, G. Gutiérrez-Alonso, R. Carrasco, J. Pedraza, J. García-Talegón, G. Alonso- Gavilán, J. Remondo, J. Bonachea, M. Morellón, New perspectives for UAV-based modelling the Roman gold mining infrastructure in NW Spain. Minerals 8, 518 (2018). DOI: https://doi.org/10.3390/min8110518
[11] J. Malos, B. Beamish, L. Munday, P. Reid, C. James, Remote monitoring of subsurface heatings in opencut coal mines, in: N. Aziz and B. Kininmonth (eds.), Proceedings of the 2013 Coal Operators’ Conference, Mining Engineering, University of Wollongong (2013).
[12] J.-C. Padró, V. Carabassa, J. Balagué, L. Brotons, J.M. Alcañiz, X. Pons, Monitoring opencast mine restorations using Unmanned Aerial System (UAS) imagery. Sci. Total Environ. 657, 1602-1614 (2019). DOI: https://doi.org/10.1016/j.scitotenv.2018.12.156
[13] J.K.S. Villanueva, A.C. Blanco, Optimization of ground control point (GCP) configuration for unmanned aerial vehicle (UAV) survey using structure from motion (SfM). Int. Arch. Photogramm. Remote Sens. Spatial Inf. Sci. XLII-4/W12, 167-174 (2019). DOI: https://doi.org/10.5194/isprs-archives-XLII-4-W12-167-2019
[14] J.M.G. Rangel, G.R. Gonçalves, J.A. Pérez, The impact of number and spatial distribution of GCPs on the positional accuracy of geospatial products derived from low-cost UASs. Int. J. Remote Sens. 39, 7154-7171 (2018). DOI: https://doi.org/10.1080/01431161.2018.1515508
[15] K. Szentpeteri, T.R. Setiawan, A. Ismanto, Drones (UAVs) in mining and Exploration. An application example: pit mapping and geological modelling, in: Unconventional Exploration Target & Latest Technique and New Tools in Mineral and Coal Exploration, (2016).
[16] K.N. Tahar, An evaluation on different number of ground control points in unmanned aerial vehicle photogrammetric block, Int. Arch. Photogramm. Remote Sens. Spatial Inf. Sci. XL-2/W2, 93-98 (2013). DOI: https://doi.org/10.5194/isprsarchives-XL-2-W2-93-2013
[17] L. Ge, X. Li, A.H.-M. Ng, UAV for mining applications: A case study at an open-cut mine and a longwall mine in New South Wales, Australia, in: IEEE International Geoscience and Remote Sensing Symposium (IGARSS), 2016, 5422-5425 (2016). DOI: https://doi.org/10.1109/IGARSS.2016.7730412
[18] Ľ. Kovanič, P. Blišťan, V. Zelizňaková, J. Palková, Surveying of open pit mine using low-cost aerial photogrammetry, in I. Ivan, A. Singleton, J. Horák, T. Inspektor (Eds.), The Rise of Big Spatial Data. Springer International Publishing, Cham (2017). DOI: https://doi.org/10.1007/978-3-319-45123-7_9
[19] L. Van Canh, C. Xuan Cuong, N. Quoc Long, L. Thi Thu Ha, T. Trung Anh, X.-N. Bui, Experimental Investigation on the Performance of DJI Phantom 4 RTK in the PPK Mode for 3D Mapping Open-Pit Mines. Inżynieria Mineralna 1, 65-74 (2020). DOI: https://doi.org/10.29227/IM-2020-02-10
[20] M. Alvarado, F. Gonzalez, A. Fletcher, A. Doshi, Towards the development of a low cost airborne sensing system to monitor dust particles after blasting at open-pit mine sites. Sensors 15, 19667-19687 (2015). DOI: https://doi.org/10.3390/s150819667
[21] M. Francioni, R. Salvini, D. Stead, R. Giovannini, S. Riccucci, C. Vanneschi, D. Gullì, An integrated remote sensing-GIS approach for the analysis of an open pit in the Carrara marble district, Italy: Slope stability assessment through kinematic and numerical methods. Comput. Geotech. 67, 46-63 (2015). DOI: https://doi.org/10.1016/j.compgeo.2015.02.009
[22] M. Shahbazi, G. Sohn, J. Théau, P. Menard, Development and Evaluation of a UAV-Photogrammetry System for Precise 3D Environmental Modeling. Sensors 15, 27493-27524 (2015). DOI: https://doi.org/10.3390/s151127493
[23] M.R. James, S. Robson, M.W. Smith, 3-D uncertainty-based topographic change detection with structure-frommotion photogrammetry: precision maps for ground control and directly georeferenced surveys. Earth Surf. Process. Landforms 42, 1769-1788 (2017). DOI: https://doi.org/10.1002/esp.4125
[24] M.R. James, S. Robson, S. d’Oleire-Oltmanns, U. Niethammer, Optimising UAV topographic surveys processed with structure-from-motion: Ground control quality, quantity and bundle adjustment. Geomorphology 280, 51-66 (2017). DOI: https://doi.org/10.1016/j.geomorph.2016.11.021
[25] N.Q. Long, B.X. Nam, C.X. Cuong, L.V. Canh, An approach of mapping quarries in Vietnam using low-cost Unmanned Aerial Vehicles. Inżynieria Mineralna 11, 248-262 (2019). DOI: https://doi.org/10.29227/IM-2019-02-79
[26] O . Mian, J. Lutes, G. Lipa, J.J. Hutton, E. Gavelle, S. Borghini, Direct georeferencing on small unmanned aerial platforms for improved reliability and accuracy of mapping without the need for ground control points. Int. Arch. Photogramm. Remote Sens. Spatial Inf. Sci. XL-1/W4, 397-402 (2015). DOI: https://doi.org/10.5194/isprsarchives-XL-1-W4-397-2015
[27] P .L. Raeva, S.L. Filipova, D.G. Filipov, Volume computation of a stockpile-a study case comparing GPS and UAV measurements in an open pit quarry. Int. Arch. Photogramm. Remote Sens. Spatial Inf. Sci. XLI-B1, 999-1004 (2016). DOI: https://doi.org/10.5194/isprsarchives-XLI-B1-999-2016
[28] S. Coveney, K. Roberts, Lightweight UAV digital elevation models and orthoimagery for environmental applications: data accuracy evaluation and potential for river flood risk modelling. Int. J. Remote Sens. 38, 3159-3180 (2017). DOI: https://doi.org/10.1080/01431161.2017.1292074
[29] T. Tonkin, N. Midgley, Ground-Control Networks for Image Based Surface Reconstruction: An Investigation of Optimum Survey Designs Using UAV Derived Imagery and Structure-from-Motion Photogrammetry. Remote Sensing 8, 786 (2016). DOI: https://doi.org/10.3390/rs8090786
[30] Z. Ren, J. Tang, T. Kalscheuer, H. Maurer, Fast 3‐D large‐scale gravity and magnetic modeling using unstructured grids and an adaptive multilevel fast multipole method. J. Geophys. Res. Solid Earth 122, 79-109 (2017). DOI: https://doi.org/10.1002/2016JB012987
Go to article

Authors and Affiliations

Nguyen Quoc Long
1
Ropesh Goyal
2
Luyen K. Bui
1
Cao Xuan Cuong
1
Le Van Canh
1
Nguyen Quang Minh
1
Xuan-Nam Bui
3

  1. Hanoi University of Mining and Geology, Faculty of Geomatics and Land Administration,18 Vien street, Hanoi, 10000, Vietnam
  2. Indian Institute of Technology Kanpur, Department of Civil Engineering, Kanpur-208016, Uttar Pradesh, India
  3. Hanoi University of Mining and Geology, Faculty of Mining,18 Vien street, Hanoi, 10000, Vietnam
Download PDF Download RIS Download Bibtex

Abstract

The transport pipeline of lifting the underwater minerals to the surface of the water onto the ship during the movement of the vessel takes in the water a curved deformed shape. Analysis of the state of stability of the pipeline showed that if the flow velocity of fluid in the pipeline exceeds a certain critical value Vkr, then its small random deviations from the equilibrium position may develop into deviations of large amplitude. The cause of instability is the presence of the centrifugal force of the moving fluid mass, which occurs in places of curvature of the axis of the pipeline and seeks to increase this curvature when the ends of the pipeline are fixed. When the critical flow velocity is reached, the internal force factors become unable to compensate for the action of centrifugal force, as a result of that a loss of stability occurs. Equations describing this dynamic state of the pipeline are presented in the article.
Go to article

Bibliography

[1] Benjamin T .B. Dynamic of a system of articulated pipes conveying fluid. I Theory. Proc. Royal Soc. 261, 457-486 (1961), II Experiment, 487-99.
[2] Chung J .S., Bao-Rang Cheng, Huttelmaier H .P. Three-Dimensional Coupled Responses of a Vertical Deep-Ocean Pipe: Part II. Excitation at Pipe Top and External Torsion, International Journal of Offshore and Polar Engineering 4, 4, December 1994 (ISSN 1053-5381).
[3] Goman O.G., Kirichenko E.A., Vishnyak E.A. Calculation of hydrodynamic loads on the elements of submersible structures of deep-water slurry pipelines. System Technologies: A collection of scientific papers – Dnipropetrovsk: RVKIA Ukraine 8, 17-23 (1999) [in Russian].
[4] Gregory R .W., Paidoussis M .P. Unstable oscillation of turbular cantilevers, conveying fluid. I Theory. Proc. of the Royal Soc., London, Ser. A, 293, 528-542 (1966).
[5] Handelman H.M. Quart. Appl. Math. 13, 326-334 (1955).
[6] Kirichenko E.A. Possible cases of simplification of the system of equations of oscillations of deep-water slurry pipelines in a flat formulation. Mining, electromechanics and automatics: A collection of scientific papers – Dnipropetrovsk: RVKNGA of Ukraine 4, 137-142 (1999) [in Russian].
[7] Long R.H. Jr. Experimental and theoretical study of transverse vibration of a tube containing flowing fluid. J. App. Mech. 22, 1, 65-68 (1955).
[8] Niordson F .I.N. Vibrations of cylindrical tube containing flowing fluid. Trans. of the Royal Inst. of Tech., Stockholm, Sweden, 1953, No.73. 392
[9] Szelangiewicz T., Żelazny K., Buczkowski R., Computer simulations of deformations and tensions in the pipelines of hydraulic lifting systems, Scientific Journals of the Maritime University of Szczecin – Zeszyty Naukowe Akademii Morskiej w Szczecinie 52 (124), 37-44 (2017). DOI : https://doi.org/10.17402/243
[10] Yao Nijun, Cao Bin, Xia Jianxin, Pressure loss of flexible hose in deep-sea mining system. 18th International Conference on TRANSPORT AND SEDIMENTATION OF SOLID PARTICLES 11-15 September 2017, Prague, Czech Republic. ISBN 978-83-7717-269-8.
[11] Yu Hong-yun, Liu Shao-jun, Dynamics of vertical pipe in deep-ocean mining system, J. Cent. South Univ. Technol. (2007) 04-0552-05. DOI : https://doi.org/10.1007/s11771-007-0106-0
Go to article

Authors and Affiliations

Jerzy Sobota
1
ORCID: ORCID
Xia Jianxin
2
ORCID: ORCID
Evgeniy Kirichenko
3
ORCID: ORCID

  1. Wrocław University of E nvironmental and Life Sciences, Poland
  2. Minzu University of China, Beijing, China
  3. Mining University, Dnipropetrovsk, Ukraine
Download PDF Download RIS Download Bibtex

Abstract

This paper focused on a study concerned with the motion of platforms at loading stations during truck changing in Trucklift slope hoisting system built in Jaeryong open-pit iron mine, DPR of Korea. The motion of platform in Trucklift slope hoisting system produces undesirable effect on truck changing. To analyze the motion of platform during truck changing, we built the dynamic model in ADAMS environment and control system in MATLAB/Simulink. Simulation results indicate that the normal truck changing can be realized without arresters at loading stations by a reasonable structural design of platforms and loading stations.
Go to article

Bibliography

[1] A.A. Kuleshov, RU Patent, 2168630 C1, filed June 10 (2001).
[2] W . Peter, WO, 2008/138055 A1, filed Nov. 20 (2008).
[3] J.D. Tarasov, RU Patent, 2284958 C1, filed Oct. 10 (2006).
[4] http://www.siemagtecberg.com/infocentre/technical-information/ti_27-trucklift.html, accessed: 05.02.2017
[5] M. Schmid, Tire modeling for multibody dynamics applications. Technical Report, sbel.wisc.edu, University of Wisconsin‐Madison, 5-14 (2011)
[6] X.B. Ning, C.L. Zhao, J.H. Shen, Procedia Engineering 16, 333-341 (2011).
[7] X.Q. Zhang, B. Yang, C. Yang, G.N. Xu, Procedia Engineering 37, 120-124 (2012).
[8] P.G. Adamczyk, D. Gorsich, G. Hudas, J. Overholt, Proceedings of SPIE 5083, 63-74 (2003).
Go to article

Authors and Affiliations

Tok Hyong Han
1
ORCID: ORCID
Kwang Hyok Kim
1
ORCID: ORCID
Un Chol Han
2
ORCID: ORCID
Kwang Myong Li
2
ORCID: ORCID

  1. Kim Chaek University of Technology, Faculty of Mining Engineering, Pyongyang, Democratic People’s Republic of Korea
  2. Kim Chaek University of Technology, School of Science and Engineering, Pyongyang, Democratic People’s Republic of Korea
Download PDF Download RIS Download Bibtex

Abstract

In deep mines, since the broken surrounding rocks & high-stress level of a roadway being near a coal seam, the creep characteristics of surrounding rocks should be considered as the main influencing factor in the selection for the roadway’s location of the lower coal seam. Both VI15 and VI16-17 coal seams of the Pingdingshan No. 4 Coal Mine, in China, Henan province, are close coal seams with a depth of around 900 m. According to the traditional formula calculation results, when the lower coal seam roadway is staggered 10 m to the upper coal seam goaf, the roadway pressure behaviour is significant, and the support becomes difficult. In this paper, the properties of surrounding rock were tested and the influence of lower coal seam on the stress state of surrounding rock is analysed by numerical simulation, and systematic analysis on the stress and creep characteristics of the surrounding rock of the mining roadway and its effects on the deformation is performed. The results demonstrated that the roadway’s locations in the lower coal seam can be initially divided into three zones: the zone with accelerated creep, the transition creep zone and the insignificant creep zone. The authors believed that the roadway layout in an insignificant creep zone can achieve a better supporting effect. Based on the geological conditions of the roadway 23070 of the VI16-17 coal seam of the Pingdingshan No. 4 Coal Mine, combined with the above analysis, a reasonable location of roadway (internal offset of 30 m) was determined using numerical simulation method. The reliability of the research results is verified by field measurement. The above results can provide a reference for selecting the roadway’s location under similar conditions.
Go to article

Bibliography


[1] Q .S. Li, X.W. Heng, Optimal Selection Method of Reasonable Mining Program for Close Distance Coal Seams Group. Coal Engineering 47 (10),12-14 (2015). DOI: https://doi.org/10.11799/ce201510004
[2] S.G. Cao, D.J. Zou, Y.J. Bai, P.J. He, H.R. Wu, Surrounding rock control of mining roadway in the thin coal seam group with short distance and “three soft”. Journal of Mining & Safety Engineering 28 (4), 524-529 (2011). DOI: https://doi.org/10.3969/j.issn.1673-3363.2011.04.005419
[3] W. Zhang, D.S. Zhang, D.H. Qi, W.M. Hu, Z.M. He, W.S. Zhang, Floor failure depth of upper coal seam during close coal seams mining and its novel detection method. Energy Exploration & Exploitation 36 (5), 1265-1278 (2018). DOI: https://doi.org/10.1177/0144598717747622
[4] Y . Zhang, C.L. Zhang, C.C. Wei, Y.D. Liu, S.Q. Zhang, J.J. Zhao,. The Study on Roadway Layout in Coordination of Mining Coal Seams Base on Failure of Floor Strata. Trans Tech Publications 889-890, 1362-1374 (2014). DOI: https://doi.org/10.4028/www.scientific.net/AMR.889-890.1362
[5] W. Yang, C.Y. Liu, B.X. Huang, Y. Yang, Determination on Reasonable Malposition of Combined Mining in Close- Distance Coal Seams. Journal of Mining & Safety Engineering 29 (1), 101-105 (2012). DOI: https://doi.org/10.3969/j.issn.1673-3363.2012.01.018
[6] G . Yan, Y.Q. Hu, X. Song, Y.P. Fu, Z. Liu, Y. Yang, Theory and Physical Simulation of Conventional Staggered Distance during Combined Mining of Ultra-close Thin Coal Seam Group. Chinese Journal of Rock Mechanics & Engineering 28 (03), 591-597 (2009). DOI: https://doi.org/10.3321/j.issn:1000-6915.2009.03.019
[7] Y . Yong, S.H. Tu, L.N. Lu, X.T. Ma, G. Jie, Unconventional staggered distance simultaneous mining theory in extremely close and thin coal seams and its application. Procedia Earth & Planetary Science 1 (1), 288-293 (2009). DOI: https://doi.org/10.1016/j.proeps.2009.09.046
[8] Y . Li, S. Zhang, J.Z. Li, X.Y. Yu, Z.Z. Quan, C. Wang, Influence of a Large Pillar on the Optimum Roadway Position in an Extremely Close Coal Seam. Journal of Engineering Science & Technology Review 9 (1), 159-166 (2016). DOI: https://doi.org/10.25103/jestr.091.24
[9] C.L. Ju, G.D. Zhao, F. Gao, Coal Pillar Size of Ultra Closed Distance Seam and Layout of Mining Gateway. Advanced Materials Research 616-618, 465-470 (2012). DOI: https://doi.org/10.4028/www.scientific.net/AMR.616-618.465
[10] D .D. Qin, X.F. Wang, D.S. Zhang, X.Y. Chen, Study on Surrounding Rock-Bearing Structure and Associated Control Mechanism of Deep Soft Rock Roadway Under Dynamic Pressure. J. Sustainability, (2019), DOI: https://doi.org/10.3390/su11071892
[11] T. Majcherczyk, P. Małkowski, Z. Niedbalski, Rock Mass Movements Around Development workings in various density of standing-and-roof-bolting support. Journal of Coal Science and Engineering (China) 14 (3), 356-360 (2008). DOI: https://doi.org/10.1007/s12404-008-0078-1
[12] T. Majcherczyk, Z. Niedbalski, P. Małkowski, Ł. Bednarek, Analysis of yielding steel arch support with rock bolts in mine roadways stability aspect. Archives of Mining Sciences 59 (3), 641-654 (2014). DOI: https://doi.org/10.2478/amsc-2014-0045
[13] P. Małkowski, Z. Niedbalski, T. Majcherczyk, Ł. Bednarek, Underground monitoring as the best way of roadways support design validation in a long time period. J. Mining of Mineral Deposits 14 (3), 1-14 (2020). DOI : https://doi.org/10.33271/mining14.03.001
[14] X. Sun, A yielding bolt-grouting support design for a soft-rock roadway under high stress: a case study of the Yuandian No. 2 coal mine in China. Journal of the Southern African Institute of Mining and Metallurgy 118 (1), 71-82 (2018). DOI: https://doi.org/10.17159/2411-9717/2018/v118n1a9
[15] Y . Yu, W. Shen, J. Gao, Deformation mechanism and control of lower seam roadway of contiguous seams. Journal of Mining & Safety Engineering 33 (01),49-55 (2016). DOI: https://doi.org/10.13545/j.cnki.jmse.2016.01.008
[16] H . Yan, M. Weng, R. Feng, W.K. Li, Layout and support design of a coal roadway in ultra-close multiple-seams. Journal of Central South University 22 (11), 4385-4395 (2015). DOI: https://doi.org/ 10.1007/s11771-015-2987-7
[17] Y .J. Qi, Q.H. Jiang, Z.J. Wang, C.B. Zhou, 3D creep constitutive equation of modified Nishihara model and its parameters identification. Chinese Journal of Rock Mechanics and Engineering 31 (2), 347-355 (2012). DOI: https://doi.org/10.3969/j.issn.1000-6915.2012.02.014
[18] A.M. Kovrizhnykh, Deformation and failure of open and underground mine structures under creep. Journal of Mining Science 45 (6), 541-550 (2009). DOI: https://doi.org/10.1007/s10913-009-0068-8
[19] I . Paraschiv-Munteanu, N.D. Cristescu, Stress relaxation during creep of rocks around deep boreholes. International Journal of Engineering Science 39 (7), 737-754 (2001). DOI: https://doi.org/10.1016/S0020-7225(00)00060-4
[20] H . Wang, W.Z. Chen, Q.B. Wang, P.Q.Zheng, Rheological properties of surrounding rock in deep hard rock tunnels and its reasonable support form. Journal of Central South University 23 (4), 898-905 (2016). DOI: https://doi.org/0.1007/s11771-016-3137-6
Go to article

Authors and Affiliations

Xufeng Wang
1
ORCID: ORCID
Jiyao Wang
1
ORCID: ORCID
Xuyang Chen
1
ORCID: ORCID
Zechao Chen
1
ORCID: ORCID

  1. Jiangsu Engineering Laboratory of Mine Earthquake Monitoring and Prevention, School of Mines, China University of Mining and Technology, Xuzhou 221116, China
Download PDF Download RIS Download Bibtex

Abstract

Cumulative blasts are an important controlled blasting method used to control the propagation of cracks in the predetermined direction. However, traditional cumulative blasts are associated with long processing times and poor blasting effects. A simple blasting technology called bilateral cumulative tensile explosion (BCTE) is proposed in this paper. There are two application types where BCTE is used. The first application is used to control the stability of high-stress roadways in both Wangzhuang mine 6208 tailgate and Hongqinghe mine 3-1103 tailgate. The second application is used to replace the backfill body in gob-side entry retaining (GER) in Chengjiao mine 21404 panel, Jinfeng mine 011810 panel and Zhongxing mine 1200 panel. The first application type reveals that BCTE can significantly reduce the deformation of the surrounding rock and reduce the associated maintenance cost of the roadways. Whereas the second application type, the roadway deformations are smaller, the process is simpler, and the production costs are lower, which further promotes GER and is of significance towards conserving resources.
Go to article

Bibliography

[1] M. Hood, Cutting strong rock with a drag bit assisted by high-pressure water jets. JS. Afr. Inst. Min. Metall. 77 (4), 79-90 (1976). DOI: https://journals.co.za/doi/abs/10.10520/AJA0038223X_715
[2] J.G. Kim, J.J. Song, Abrasive water jet cutting methods for reducing blast-induced ground vibration in tunnel excavation. Int. J. Rock Mech. Sci. 75, 147-158 (2015). DOI: https://doi.org/10.1016/j.ijrmms.2014.12.011
[3] B.X. Huang, Y.Z. Wang, Roof weakening of hydraulic fracturing for control of hanging roof in the face end of high gassy coal longwall mining: a case study. Arch. Min. Sci. 61 (3), 601-615 (2016). DOI: https://doi.org/10.1515/amsc-2016-0043
[4] J. Kabiesz, A. Lurka, J. Drzewiecki, Selected methods of rock structure disintegration to control mining hazards. Arch. Min. Sci. 60 (3), 807-824 (2015). DOI: https://doi.org/10.1515/amsc-2015-0053
[5] S.S. Rathore, S. Bhandari, S.S, Rathore, S. Bhandari, Controlled fracture growth by blasting while protecting damages to remaining rock. Rock. Mech. Rock. Eng. 40 (3), 317-326 (2017). DOI: https://doi.org/10.1007/s00603-005-0080-5
[6] S.H. Cho, Y. Nakamura, B. Mohanty, Numerical study of fracture plane control in laboratory-scale blasting. Eng. Fract. Mech. 75 (13), 3966-3984 (2008). DOI: https://doi.org/10.1016/j.engfracmech.2008.02.007
[7] K. Katsuyama, H. Kiyokawa, K. Sassa. Control the growth of cracks from a borehole by a new method of smooth blasting. Mining Safety 29, 16-23 (1983).
[8] C.L.N. Foster, A Treatise on Ore and Stone Mining, Charles Griffin amp (1905).
[9] U . Langefors, B. Kihlström, The modern technique of rock blasting, Wiley (1978).
[10] W. Fourney, J. Dally, D. Holloway, Controlled blasting with ligamented charge holders, Int. J. Rock Mech. Min. 15 (3), 121-129 (1978). DOI: https://doi.org/10.1016/0148-9062(78)90006-2
[11] L. Costin, Static and dynamic fracture behavior of oil shale, in: West Conshohocken, America, S. Freiman and E. Fuller (Eds.), ASTM International (1981).
[12] G . Bjarnholt, R. Holmberg, F. Ouchterlony, A linear shaped charge system for contour blasting, in: Dallas, Australia, Koiiya C.C. (Eds.), Proceeding of 9th conference on explosives and blasting technique Dallas (1983).
[13] D . Guo, H. Pei, J. Song, F. Qin, X. Liu, Study on spliting mechanism of coal bed deep-hole cumulative blasting to improve permeability. J. China Coal Soc. 33 (12), 1381-1385 (2008). DOI: https://doi.org/10.13225/j.cnki.jccs.2008.12.025
[14] S. Wang, Y. Wei, Fracture Control in Rock Blasting. Int. J. Min. Sci. Technol. 14 (3), 113-120 (1985).
[15] W.L. Fourney, D.B. Barker, D.C. Holloway, Model Studies of Explosive Well Stimulation Techniques. Int. J. Rock. Mech. Min. Sci. 18, 113-127 (1981). DOI: https://doi.org/10.1016/0148-9062(81)90737-3
[16] M. He, W. Cao, R.L. Shan, S. Wang, New blasting technology-bilateral cumulative tensile explosion. Chin. J. Rock Mech. Eng. 22 (12), 2047-2051 (2003).
[17] Z. Zhijie, W. Yunlong, H. Jun, Y. Chen, Overburden failure and ground pressure behaviour of longwall top coal caving in hard multi-layered roof. Arch. Min. Sci. 64 (3), 575-590 (2019). DOI: https://doi.org/10.24425/ams.2019.129370
[18] M. He, W. Cao, S. Wang, Bilateral cumulative tensile blasting and its application in shaping blasting of caverns. J. Saf. Environ. 4 (1), 8-10 (2004).
[19] M. He, C. Wang, X. Li, Study on controlled shaping blasting technology for jointed rock mass. Rock. Soil. Mech. 25 (11), 1749-1753 (2004) . DOI: https://doi.org/10.16285/j.rsm.2004.11.015
[20] C. Yan, S. Wang, M. Ren, H. Cheng, L. Chun, Application of Blast of Pulling Stress and Gather Energy Model to the Defence Project. Expl. Eng. z1, 304-305 (2003). DOI: https://doi.org/10.3969/j.issn.1672-7428.2003.z1.104
[21] Z. Zhang, On the initiating, glowing branching and sloping of crack in rock blasting. Blasting. 16 (4), 21-24 (1999).
[22] S.V. Klishin, S.V. Lavrikov, A.F. Revuzhenko, Numerical Simulation of Abutment Pressure Redistribution during Face Advance, AIP Conference Proceedings (2017).
[23] N . Hosseini, K. Oraee, Studying the stress redistribution around the longwall mining panel using passive seismic velocity tomography and geostatistical estimation. Arab. J. Geosci. 6 (5) 1407-1416 (2013). DOI: https://doi.org/10.1007/s12517-011-0443-z.
[24] Z.H. Ouyang, Mechanism and experiment of hydraulic fracturing in rock burst prevention. CRC Press-Taylor & Francis Group (2013).
[25] A. Royanfar, K. Shahriar, Investigation of factors affecting floor heave and convergence of galleries in Tabas coal mine. Uceat-Chamber Mining Engineers Turnkey, (2007).
[26] X. Zhang, R.Y.S. Pak, Y. Gao, Field experiment on directional roof presplitting for pressure relief of retained roadways. Int. J. Rock Mech. Sci. 134, 104436 (2020). DOI: https://doi.org/10.1016/j.ijrmms.2020.104436
[27] M. He, Z. Song, A. Wang, Theory of longwall mining by using roof cuting shortwall team and 110 method – the third mining science and technology reform. Coal. Sci. Technol. Mag. 1, 1-9+13 (2017). DOI: https://doi.org/10.19896/j.cnki.mtkj.2017.01.002
[28] J. Yang, B. Liu, Y. Gao, Y. Wang, Y. Cheng, S. Hou, Dynamic Load Characteristics and the Pressure Reduction Caused by the Cutting Seam on the Roadside Roof of a Large Mining Height Longwall Face in a Shallow Coal Seam. Geotech. Geol. Eng. 37 (4), 2949-2962 (2019). DOI: https://doi.org/10.1007/s10706-019-00811-6
[29] Q. Wang, M. He, J. Yang, H. Gao, B. Jiang, H. Yu, Study of a no-pillar mining technique with automatically formed gob-side entry retaining for longwall mining in coal mines. Int. J. Rock. Mech. Min. Sci. 110, 1-8 (2018). DOI: https://doi.org/10.1016 /j.ijrmms.2018.07.005.
[30] J. Yang, M. He, C. Cao, Design principles and key technologies of gob side entry retaining by roof pre-fracturing. Tunn. Undergr. Sp. Tech. 90, 309-318 (2019). DOI: https://doi.org/10.1016/j.tust.2019.05.013
[31] L. Dong, Application of Roof Cutting and Pressure Relief Technology in 6212 Face of Wangzhuang Coal Mine. Coal. 28 (9), 54-55+83 (2019). DOI: https://doi.org/10.3969/j.issn.1005-2798.2019.09.021
[32] Y. Gao, J. Yang, X. Zhang, H. Xue, M. He, Study on roadway surroundings control using roof cutting and pressure release technology by directional tensile blasting in deep coal mines. Chin. J. Rock Mech. Eng. 38 (10), 2045-2056 (2019). DOI: https://doi.org/10.13722/j.cnki.jrme.2019.0465
[33] S. Cheng, PhD thesis, Study on Stability Mechanism of Surrounding Rock and its Control for Gob-side Entry Retaining by Cutting Roof to Release Pressure in Deep Working Face of Chengjiao coal mine. China University of Mining and Technology (Beijing), Beijing,China, (2017).
[34] Q. Han, PhD thesis, Study on Stability Control Mechanism of the Formed Lane through Roof Cutting in “Three Soft” Working Face in Zhongxing Mine. China University of Mining and Technology (Beijing), Beijing, China, (2017).
[35] X. Sun, Q. Han, J. Wang, Study on Technology Application of Gob-side Entry Retaining in Zhongxing Mine 1200 Working Face. Coal. Technol. 36 (2), 28-30 (2017). DOI: https://doi.org/10.13301/j.cnki.ct.2017.02.011
[36] Z. Wen, Practice of Non Pillar Mining in Large and Medium Thick Coal Seam in Yongcheng Mining Area. Chin. J. under. S. Eng. 15 (S1), 256-259 (2019).
[37] X. Sun, G. Li, P. Song, C. Miao, C. Zhao, Application research on gob-side entry retaining methods in No. 1200 working face in Zhongxing mine. Geotech. Geol. Eng. 37 (1), 185-200 (2019). DOI: https://doi.org/10.1007/s10706-018-0602-z
[38] E. Zhen, Y. Gao, Y. Wang, S. Wang, Comparative study on two types of nonpillar mining techniques by roof cutting and by filling artificial materials. Adv. Civ. Eng. 2019, 5267240 (2019). DOI: https://doi.org/10.1155/2019/5267240
Go to article

Authors and Affiliations

Jun Yang
1
ORCID: ORCID
Binhui Liu
1
ORCID: ORCID
Wenhui Bian
1
ORCID: ORCID
Kuikui Chen
1
ORCID: ORCID
Hongyu Wang
1
ORCID: ORCID
Chen Cao
2
ORCID: ORCID

  1. China University of Mining and Technology, State Key Laboratory for Geomechanics and Deep Underground Engineering, Beijing 100083, China
  2. University of Wollongong, Mining & Environment Engineering, School of Civil, Wollongong, NSW 2522, Australia
Download PDF Download RIS Download Bibtex

Abstract

The article is the result of a project aimed at developing and implementing a design of composite accessories for support in excavations located in underground hard coal mines. The research team verified the possibility of using elements made of prefabricated composite structural profile as an alternative to steel and reinforced concrete lining elements used to improve support’s stability and protect against rockfall.
This paper includes a research experiment on the possibilities of using a composite C-profile element as lining made in the pultrusion technology with a longitudinal position of the roving. The prefabricated structural profiles were adapted to the function by designing seatings for fitting the flanges for arch support’s V-profiles. Prototypes of these elements were subjected to bench tests in compliance with the guidelines for testing mesh linings. In addition, computer simulations using the finite element method were carried out.
The values obtained during the tests were compared with the requirements for lightweight mesh and included the Polish standard PN-G-15050 and reinforced A-type concrete lining defined in the standard ­PN-G-06021. The team determined the areas where material strength exceeded and the structure was damaged. Despite the limited quantity of laboratory tests and lack of field tests in actual mining conditions, it was possible to address the argument of the research and determine whether it is possible to use C-profile made in the pultrusion technology as a lining element.
Go to article

Bibliography

[1] PN-G-15050:2018-01 Obudowa wyrobisk górniczych. Siatki okładzinowe zgrzewane.
[2] PN-G-06021:1997 Obudowa górniczych wyrobisk korytarzowych. Okładziny żelbetowe.
[3] M. Rotkegel. Wpływ sposobu montażu siatek okładzinowych na ich pracę. Przegląd Górniczy 70 (3), 79-85 (2014).
[4] J. Olszewski, Leksykon górniczy: praca zbiorowa. Katowice: Wydawnictwo Śląsk (1989).
[5] L . Nickels, The future of pultrusion. Reinf. Plast. 63 (3), 132-135 (2019). DOI: https://doi.org/10.1016/j.repl.2019.01.003
[6] G .G. Litwinskij, G.I. Gajko, N.I. Kyldyrkajew, Stalnyje ramnyje kriepi gornych wyrabotok. Kijew: Technika (1999).
[7] M. Grodzicki, M. Rotkegel, The concept of modification and analysis of the strength of steel roadway supports for coal mines in the Soma Basin in Turkey. Studia Geotechnica et Mechanica 40 (1), 38-45 (2018). DOI: https://doi.org/10.2478/sgem-2018-0006
[8] G .I. Gayko, M. Rotkegel, Issliedowanija niesuszcziej sposobnosti arocznoj kriepi pri razlicznych wariantach nagrużienia. Ugoł Ukrainy 2, 45-47 (2003).
[9] P. Horyl, R. Snuparek, P. Marsalek, K. Pacześniowski, Simulation of laboratory tests of steel arch support. Arch. Min. Sci. 62 (1), 63-176 (2017). DOI: http://doi.org/10.1515/amsc-2017-0012455
[10] H. Filcek, J. Walaszczyk, A. Tajduś, 1994. Metody komputerowe w geomechanice górniczej. Śląskie Wydawnictwo Techniczne (1994).
[11] R .D. Cook, D.S. Malkus, M.E. Plesha, R.J. Witt, Finite Element Modeling for Stress Analysis. John Wiley & Sons, Inc. (2002).
[12] CO SMOS/M User’s Guide, Los Angeles, Structural Research & Analysis Corp. (1999).
[13] E. Rusiński, Metoda elementów skończonych. System COSMOS/M. Wydawnictwo Komunikacji i Łączności (1994).
[14] A. Pytlik. Tests of steel arch and rock bolt support resistance to static and dynamic loading induced by suspended monorail transportation. Studia Geotechnica et Mechanica 41 (2), 81-92 (2019). DOI: https://doi.org/10.2478/sgem-2019-0009
[15] A. Pytlik. Comparative bench testing of steel arch support systems with and without rock bolt reinforcements. Arch. Min. Sci. 64 (4), 747-764 (2019). DOI: http://doi.org/10.24425/ams.2019.131064
[16] PN-G-15022:2018-11 Odrzwia podatne z kształtowników korytkowych – Wymagania wytrzymałościowe i badania.
[17] PN-G-15024:2017-10 Obudowa wyrobisk górniczych – Rozpory stalowe dwustronnego działania.
[18] PN-G-15026:2017-04 Obudowa wyrobisk górniczych – Strzemiona oraz złącza odrzwi z kształtowników korytkowych – Badania wytrzymałościowe.
[19] PN-G-14050:1998 Betonity fundamentowe do obudowy odrzwiami z łuków korytkowych wyrobisk górniczych poziomych i mało nachylonych – Wymagania i badania.
[20] PN-G-15092:1999 Kotwie górnicze – Badania.
[21] PN-G-15533:1997 Górnicza obudowa indywidualna – Stojaki cierne – Wymagania i badania.
Go to article

Authors and Affiliations

Marek Rotkegel
1
ORCID: ORCID
Jerzy Korol
1
ORCID: ORCID
Dagmara Sobczak
1
ORCID: ORCID

  1. Central Mining Institute, Plac Gwarków 1, 40-166, Katowice, Poland
Download PDF Download RIS Download Bibtex

Abstract

Heat exhaustion of mining environments can cause a significant threat to human health. The existing cooling strategies for the mine face aim to cool the whole face. However, the necessary cooling space for the face is small, with a considerable amount of energy for cooling being wasted. Necessary cooling space is a space occupied by the workers in the face. This study proposed to build a non-homogeneous thermal environment for cost-effective energy savings in the face. An inlet air cooler was laid out in the intake airway to cool the whole face to some extent, and the tracking air cooler was designed to track the worker who constantly moved to improve the thermal environment. The cooling load and air distribution for this cooling strategy were investigated. In addition, the airflow in the face was solved numerically to estimate the cooling effect. The results revealed that an average energy saving of approximately 35% could be achieved. The thermal environment of the necessary cooling space within at least 10 m was significantly improved. This cooling strategy should be taken into account in mine cooling.
Go to article

Bibliography

[1] J.A. Crawford, H.P.R. Joubert, M.J. Mathews, M. Kleingeld, Optimised dynamic control philosophy for improved performance of mine cooling systems. Appl. Therm. Eng. 150, 50-60 (2019). DOI : https://doi.org/10.1016/j.applthermaleng.2018.12.160
[2] Z. Chu, J. Ji, X. Zhang, H. Yan, H. Dong, J. Liu, Development of ZL400 mine cooling unit using semi-hermetic screw compressor and its application on local air conditioning in underground long-wall face. Arch. Min. Sci. 61 (4), 949-966 (2016). DOI: https://doi.org/10.1515/amsc-2016-0063
[3] L. Guo, W. Nie, S. Yin, Q. Liu, Y. Hua, L. Cheng, X. Cai, Z. Xiu, T. Du, The dust diffusion modeling and determination of optimal airflow rate for removing the dust generated during mine tunneling. Build. Environ. 178, 106846 (2020). DOI: https://doi.org/10.1016/j.buildenv.2020.106846
[4] Z. Różański, P. Wrona, J. Sułkowski, J. Drenda, G. Pach, Two stage assessment of thermal hazard in an underground mine. Arch. Min. Sci. 61 (2), 309-322 (2016). DOI: https://doi.org/10.1515/amsc-2016-0023
[5] J. Ji, N. Li, Z. Chang, Y. Fan, L. Ni, Study on heat transfer characteristic parameters and cooling effect of cold wall cooling system in coal mines. Exp. Heat. Transfer. 33 (2), 1-18 (2019). DOI : https://doi.org/10.1080/08916152.2019.1576802
[6] Z.G. Su, Z.A. Jiang, Z.Q. Sun, Study on the heat hazard of deep exploitation in high-temperature mines and its evaluation index. Procedia Earth Planet. Sci. 1, 414-419 (2009). DOI: https://doi.org/10.1016/j.proeps.2009.09.066
[7] A.M. Donoghue, M.J. Sinclair, G.P. Bates, Heat exhaustion in a deep underground metalliferous mine. Occup. Environ. Med. 57, 165-74 (2000).
[8] E.H. Lee, C. Luo, Y.L. Sam, A.C. Roberts, K.W. Kwok, J. Car, C. Soh, G.I. Christopoulos, The underground workspaces questionnaire (UWSQ): Investigating public attitudes toward working in underground spaces. Build. Environ. 153, 28-34 (2019). DOI: https://doi.org/10.1016/j.buildenv.2019.02.017
[9] G . Katavoutas, M.N. Assimakopoulos, D.N. Asimakopoulos, On the determination of the thermal comfort conditions of a metropolitan city underground railway. Sci. Total. Environ. 566, 877-887 (2016). DOI : https://doi.org/10.1016/j.scitotenv.2016.05.047
[10] L.E. Armstrong, R.M. Lopez, Return to exercise training after heat exhaustion. J. Sport Rehab. 16, 182-189 (2007). DOI: https://doi.org/10.1016/j.jsams.2006.11.001
[11] Y. Kasap, The effect of work accidents on the efficiency of production in the coal sector. S. Afr. J. Sci. 107, 77-85 (2011). DOI: https://doi.org/10.4102/sajs.v107i5/6.513
[12] H .S. Li, S.Y. Liu, H.H. Chang, Experimental research on the influence of working parameters on the drilling efficiency. Tunnel. Underground Space Technol. 95, 11 (2020). DOI: https://doi.org/10.1016/j.tust.2019.103174
[13] J.G. Pretorius, M.J. Mathews, P. Maré, M. Kleingeld, J.V. Rensburg, Implementing a DIKW model on a deep mine cooling system. Int. J. Min. Sci. Technol. 29 (2), 319-326 (2019). DOI : https://doi.org/10.3969/j.issn.2095-2686.2019.02.019
[14] N. Szlązak, D. Obracaj, J. Swolkień, K. Piergies, Controlling the distribution of cold water in air cooling systems of underground mines. Arch. Min. Sci. 61 (4), 793-807 (2016). DOI: https://doi.org/10.1515/amsc-2016-0054
[15] C . Jin, X. Bai, Y. An, J. Ni, J. Shen, Case study regarding the thermal environment and energy efficiency of raisedfloor and row-based cooling. Build. Environ. 182, 107110 (2020). DOI : https://doi.org/10.1016/j.buildenv.2020.107110
[16] S. Wang, L. Jin, Z. Han, Y. Li, S. Ou, N. Gao, Z. Huang, Discharging performance of a forced-circulation ice thermal storage system for a permanent refuge chamber in an underground mine. Appl. Therm. Eng. 110, 703-709 (2017). DOI: https://doi.org/10.1016/j.applthermaleng.2016.08.192
[17] B. Nowak, P. Życzkowski, R. Łuczak, Functional dependence of thermodynamic and thermokinetic parameters of refrigerants used in mine air refrigerators. Part 1-refrigerant R407C. Arch. Min. Sci. 62 (1), 55-72 (2017). DOI: https://doi.org/10.1515/amsc-2017-0005
[18] S. Rahnama, P. Sadeghian, P.V. Nielsen, C. Zhang, S. Sadrizadeh, A. Afshari, Cooling capacity of diffuse ceiling ventilation system and the impact of heat load and diffuse panel distribution. Build. Environ. 185, 107290 (2020). DOI: https://doi.org/10.1016/j.buildenv.2020.107290
[19] H . Shi, Q. Chen, Building energy management decision-making in the real world: A comparative study of HVAC cooling strategies. J. Build. Eng. 33, 101869 (2021). DOI: https://doi.org/10.1016/j.jobe.2020.101869
[20] H .X. Guo, K.J. Zhu, C. Ding, L.L. Li, Intelligent optimization for project scheduling of the first mining face in coal mining. Expert Syst. Appl. 37, 1294-1301 (2010). DOI: https://doi.org/10.1016/j.eswa.2009.06.025
[21] T. Ahmad, H.X. Chen, Short and medium-term forecasting of cooling and heating load demand in building environment with data-mining based approaches. Energ. Buildings. 166, 460-76 (2018). DOI : https://doi.org/10.1016/j.enbuild.2018.01.066
[22] P. Guo, C. Chen, Field experimental study on the cooling effect of mine cooling system acquiring cold source from return air. Int. J. Min. Sci. Technol. 23, 453-456 (2013). DOI: https://doi.org/10.1016/j.ijmst.2013.05.008
[23] E. Abdelaziz, R. Saidur, S. Mekhilef, A review on energy saving strategies in industrial sector. Renewable Sustainable Energy Rev. 15, 150-168 (2011). DOI: https://doi.org/10.1016/j.rser.2010.09.003
[24] G .E. du Plessis, L. Liebenberg, E.H. Mathews, Case study: The effects of a variable flow energy saving strategy on a deep-mine cooling system. Appl. Energ. 102, 700-709 (2013). DOI : https://doi.org/10.1016/j.apenergy.2012.08.024
[25] H .L. Hartman, J.M. Mutmansky, R.V. Ramani, Y. Wang, Mine ventilation and air conditioning, 2012 John Wiley & Sons, California. [26] A.W. Homer, Coal mine safety regulation in China and the USA. J. Contemp. Asia. 39, 4-39 (2009).
[27] A.P. Sasmito, J.C. Kurnia, E. Birgersson, A.S. Mujumdar, Computational evaluation of thermal management strategies in an underground mine. Appl. Therm. Eng. 90, 1144-1150 (2015). DOI: https://doi.org/10.1016/j.applthermaleng.2015.01.062
[28] X. Li, H. Fu, Development of an efficient cooling strategy in the heading face of underground mines. Energies 13 (5), 1116 (2020). DOI: https://doi.org/10.3390/en13051116
Go to article

Authors and Affiliations

Xian Li
1
ORCID: ORCID
Yaru Wu
1
ORCID: ORCID
Yunfei Zhang
2
ORCID: ORCID

  1. Linyi University, School of Civil Engineering and Architecture, Linyi 276000, P.R. China
  2. Hohai University, College of Civil and Transportation Engineering, Nanjing 210098, P.R. China
Download PDF Download RIS Download Bibtex

Abstract

In order to study the failure mechanism and characteristics for strip coal pillars, a monitoring device for strip coal pillar uniaxial compression testing was developed. Compression tests of simulated strip coal pillars with different roof and floor rock types were conducted. Test results show that, with increasing roof and floor strength, compressive strength and elastic modulus of “roof-strip coal pillar-floor” combined specimens increase gradually. Strip coal pillar sample destruction occurs gradually from edge to the interior. First macroscopic failure occurs at the edge of the middle upper portion of the specimen, and then develops towards the corner. Energy accumulation and release cause discontinuous damage in the heterogeneous coal-mass, and the lateral displacement of strip coal pillar shows step and mutation characters. The brittleness and burst tendency of strip coal pillar under hard surrounding rocks are more obvious, stress growth rate decreases, and the rapid growth acoustic emission (AE) signal period can be regarded as a precursor for instability in the strip coal pillar. The above results have certain theoretical value for understanding the failure law and long-term stability of strip coal pillars.
Go to article

Bibliography

[1] M.D.G. Salamon, Stability, instability and design of pillar workings. Int. J. Rock. Mech. Min. 7 (6), 613-631 (1970). DOI: https://doi.org/10.1016/0148-9062(70)90022-7
[2] T.P. Medhurst, E.T. Brown, A study of the mechanical behaviour of coal for pillar design. Int. J. Rock. Mech. Min. 35 (8), 1087-1105 (1998). DOI: https://doi.org/10.1016/S0148-9062(98)00168-5
[3] J .N.V.D. Merwe, Predicting coal pillar life in South Africa. J. S. Afr. I. Min. Metall. 103 (5), 293-301 (2003).
[4] A.W. Kahir, S.S. Peng, Causes and mechanisms of massive pillar failure in a southern west virginia coal mine. Int. J. Rock. Mech. Min. 22 (6), 189-189 (1985). DOI: https://doi.org/10.1016/0148-9062(85)90193-7
[5] E. Ghasemi, M. Ataei, K. Shahriar, Prediction of global stability in room and pillar coal mines. Nat. Hazards. 72 (2), 405-422 (2014). DOI: https://doi.org/10.1007/s11069-013-1014-2
[6] V . Kajzar, R. Kukutsch, P. Waclawik, J. Nemcik, Innovative approach to monitoring coal pillar deformation and roof movement using 3d laser technology. Procedia. Eng. 191, 873-879 (2017). DOI: https://doi.org/10.1016/j.proeng.2017.05.256
[7] W .J. Guo, H.L. Wang, Z.P. Liu, Coal pillar stability and surface movement characteristics of deep wide strip pillar mining. J. Min. Saf. Eng. 32 (3), 369-375 (2015). DOI: https://doi.org/10.13545/j.cnki.jmse.2015.03.004
[8] S.J. Chen, X. Qu, D.W. Yin, X.Q. Liu, H.F. Ma, H.Y. Wang, Investigation lateral deformation and failure characteristics of strip coal pillar in deep mining. Geomech. Eng. 14 (5), 421-428 (2018). DOI: https://doi.org/10.12989/gae.2018.14.5.421
[9] S.J. Chen, D.W. Yin, N. Jiang, F. Wang, Z.H. Zhao, Mechanical properties of oil shale-coal composite samples. Int. J. Rock. Mech. Min. 123, 104-120 (2019). DOI: https://doi.org/10.1016/j.ijrmms.2019.104120
[10] Y. Tan, W.B. Guo, Y.H. Zhao, Engineering stability and instability mechanism of strip Wongawilli coal pillar system based on catastrophic theory. J. China. Coal. Soc. 41 (7), 1667-1674 (2016). DOI: https://doi.org/10.13225/j.cnki.jccs.2015.1593
[11] J .H. Xu, X.X. Miao, X.C. Zhang, Analysis of the time-dependence of the coal pillar stability. J. China. Coal. Soc. 30 (4), 433-437 (2005).
[12] T. Sherizadeh, P.S.W. Kulatilake, Assessment of roof stability in a room and pillar coal mine in the u.s. using three-dimensional distinct element method. Tunn. Undergr. Sp. Tech. 59, 24-37 (2016). DOI: https://doi.org/10.1016/j.tust.2016.06.005
[13] G .L. He, D.C. Li, Z.W. Zhai, G.Y. Tang, Analysis of instability of coal pillar and stiff roof system. J. China. Coal. Soc. 32 (9), 897-901 (2007). DOI: https://doi.org/10.1016/S1872-2067(07)60020-5
[14] W . Gao, M.M. Ge, Stability of a coal pillar for strip mining based on an elastic-plastic analysis. Int. J. Rock. Mech. Min. 87, 23-28 (2016). DOI: https://doi.org/10.1016/j.ijrmms.2016.05.009
[15] J .P. Zuo, Y. Chen, F. Cui, Investigation on mechanical properties and rock burst tendency of different coal-rock combined bodies. J. China. U. Min. Techno. 47 (1), 81-87 (2018).490
[16] J .P. Zuo, Y. Chen, J.W. Zhang, J.T. Wang, Y.J. Sun, G.H. Jiang, Failure behavior and strength characteristics of coal-rock combined body under different confining pressures. J. China. Coal. Soc. 41 (11), 2706-2713 (2016). DOI: https://doi.org/10.13225/j.cnki.jccs.2016.0456
[17] S.J. Chen, D.W. Yin, B.L. Zhang, H.F. Ma, X.Q. Liu, Mechanical characteristics and progressive failure mechanism of roof-coal pillar structure. Chin. J. Rock. Mech. Eng. 36 (7), 1588-1598 (2017). DOI: https://doi.org/10.13722/j.cnki.jrme.2016.1282
[18] B.N. Hu, Stability analysis of coal pillar in strip mining. J. China. Coal. Soc. 20 (2), 205-210 (1995). DOI: https://doi.org/10.13225/j.cnki.jccs.1995.02.020
[19] A.H. Wilson, An hypothesis concerning pillar stability. Min. Eng. 131 (6), 409-417 (1972).
[20] J .K. Xu, R. Zhou, D.Z. Song, N. Li, K. Zhang, D.Y. Xi, Deformation and damage dynamic characteristics of coalrock materials in deep coal mines. Int. J. Damage. Mech. 28 (1), 58-78 (2019). DOI: https://doi.org/10.1177/1056789517741950
[21] H .P. Xie, Y. Ju, L.Y. Li, R.D. Peng, Energy mechanism of deformation and failure of rock masses. Chin. J. Rock. Mech. Eng. 27 (9), 1729-1740 (2008).
[22] Z.H. Zhao, H.P. Xie, Energy Transfer and Energy Dissipation in Rock Deformation and Fracture. J. Sichuan. Univ. 40 (2), 26-31 (2008).
[23] L.R. Myer, J.M. Kemeny, Z. Zheng, R. Suarez, R.T. Ewy, N.G.W. Cook, Extensile cracking in porous rock under differential compressive stress. Appl. Mech. Rev. 45 (8), 263-280 (1992). DOI: https://doi.org/10.1115/1.3119758
Go to article

Authors and Affiliations

Xiao Qu
1
Shaojie Chen
1
Dawei Yin
Shiqi Liu

  1. Hohai University, China

Instructions for authors

General information

It is essential for us that authors write and prepare their manuscripts according to the instructions and specifications listed below. Therefore, authors are strongly encouraged to read these instructions carefully before preparing a manuscript for submission.

Archives of Mining Sciences (AMS) is concerned with original research, new developments and case studies in all fields of mining sciences which include:

- mining technologies,

- stability of mine workings,

- rock mechanics,

- geotechnical engineering and tunnelling,

- mineral processing,

- mining and engineering geology,

- mining geophysics,

- mining geodesy

- ventilation systems,

- environmental protection in mining,

- economical aspects in mining,

- mining machine science.

Papers are welcomed on all relevant topics and especially on theoretical developments, analytical methods, numerical methods, rock testing, site investigation, and case studies.

AMS publishes research and review articles, technical notes.

Papers suitable for publication in AMS are those which:

- contain original work - the main result is not published elsewhere neither by the authors nor somebody else, and is not currently under consideration for publication in any other journal,

- are focused on the core aims and scope of the journal,

- are clearly and correctly written in English.

Authors are required to contribute to the cost of publication – publication charge 1000 PLN or 250 Euro. There is no submission charge.

Electronic submission:

All submissions must be made electronically via Editorial System https://www.editorialsystem.com/editor/amsc/articles/list/?qt=NEW

Language

The papers should be written in English.

Length of paper

The research and review articles may not exceed 16 typewritten pages, technical notes -10 pages, format A4 including figures and tables.

Format

The initial submission should be sent as Microsoft World (Arial, 12 points, line spacing - 1,5) or pdf file with all drawings, pictures and tables placed in the text.

After acceptance the text (in Microsoft Word), figures and tables should be sent as separate files.

Layout of the manuscript

First and last name(s) of the author(s), title of the article, abstract, keywords, methodology and introduction to the topics, results, conclusions, acknowledgements and references. The subtitles should conform to the decimal system of numbering.

Abstracts

The abstract should briefly summarize the most important results reported in the paper (up to 200 words).

Keywords.4-6 keywords

Formulae

Formulae should be prepared with Microsoft Equation, written clearly with distinct notation of upper and lower indices and parentheses, maintaining an uniform numbering.

Tables

Tables should be prepared as separate file in Microsoft World format.

Figures

If possible, the figures should be prepared with a vector graphics software (cdr, wmf, al or dxf formats) or as eps, jpg, bmp (figures width no greater than 13.5 cm). Use Arial font for the comments on drawings in size 6-10 points. The photographs should be converted to high resolution scans in *.jpg or *.tiff format. Figures should be submitted as separate files.

References

A bibliography without numbering, arranged alphabetically according to the author’s last name, should include all positions referring in the text. In case of more than one article from the same year, the articles should be differentiated as follows: 1985a, 1985b, etc. The following order is required: last name and initials of all co-authors, year, title, type of publications, (journal, conference material, collection of monograph articles, unpublished texts) with the page numbers used.

Quoting references

Name(s) of the author(s) should be provided in parentheses. e.g.: (Brandt, 1993), (Crosdale & Beamish, 1994). (Dziurzynski et al., 1990) in the case of one, two or more than two authors, respectively. If the name(s) of the author(s) is included in the text, then the reference should be cited as follows e.g.: „According to Brandt (1993)...”

Example of bibliography.

Brandt, J., 1993. Neuere Erkentnisse auf dem Gebiet der Gasausbruchprognose. Glückauf Forschungshefte 54, 5, 228-233.

Crosdale, P. J., Beamish, B.B., 1994. Methane sorption studies at South Bulli (NSW) & Central (QLD) collieries using a high-pressure microbalance. 28 Newcastle Symposium on „Advances in the study of Sydney Basin”, Newcastle, NSW, Australia, 15-17 April, 118-125.

Dziurzynski, W., Trutwin W., Tracz J., 1990. Symulacja komputerowa przepływu powietrza i gazów powyrzutowych w sieci wentylacyjnej kopalni. J. Litwiniszyn (Ed.), Górotwór jako ośrodek wielofazowy; Wyrzuty skalno-gazowe. Wydawnictwo AGH, Kraków, Vol. II, 743-758.

Lama R. D., Bodziony, J., 1996. Outbursts of gas, coal and rock in underground mines. Publisher Lama & Associates, 130 Brokers Road, Mt. Pleasant, NSW 2519, Australia.

Nekrasovski, Ya. E., 1951. Razrabotka plastov podverzhennykh vnezapnym vybrosam ugla i gaza. Ugletekhizdat, Moskva.

This page uses 'cookies'. Learn more