Journal of Failure Analysis and Prevention

, Volume 18, Issue 6, pp 1503–1515 | Cite as

Evaluation of Coal Bump Risk During Underground Mining: A Case Study of Tabas Coal Mine

  • Mohammad Javadi
  • Gholamreza SaeediEmail author
  • Kourosh Shahriar
Technical Article---Peer-Reviewed


Coal bump is one of the most important hazards for underground miners due to occurrence without warning. This hazard leads to the problems in the form of injury, disability or fatality as well as economic loss for the mining companies. As a result, development of a model for risk analysis of coal bump is an important issue in safety of underground coal mining. Although the mechanism of the bump is not well understood, it is found that stress condition is strongly associated with the coal bump. In this research, a numerical model is developed for analyzing of coal bump risk to map the zones with a high risk in Tabas Coal Mine, Iran. Results show that the concentration of the abutment stress that could lead to a coal bump starts at more than 25 m in front of the mining face and increases nearer the face. Moreover, stress concentration starts to accelerate at a distance of 10 m ahead of the mining face. Large and rapid stress concentration is a distinct precursor of coal bump occurrence during longwall mining. Therefore, zones at a distance less than 10 m in front of the face are predicted as the bump-prone zones. The mentioned zones that moved ahead of the mining face must be considered in the mine risk analysis plan. The numerical results were validated against the monitoring data collected to measure the roof displacement in the mine roadways and confirm that prediction of the coal bump by this approach is accurate and satisfied.


Coal bump Stress distribution Longwall FLAC3D 



The authors would like to acknowledge the Shahid Bahonar University of Kerman, Iran (SBHK) and the University of Toronto, Lassonde Institute of Mining for their supports during my sabbatical leave.


  1. 1.
    C. Mark, M. Gauna, Evaluating the risk of coal bursts in underground coal mines. Int. J. Min. Sci. Technol. 26(1), 47–52 (2016)CrossRefGoogle Scholar
  2. 2.
    S.S. Peng, Longwall Mining (Inc.(SME), Englewood, 2006)Google Scholar
  3. 3.
    J. Ptáček, P. Konicek, L. Staš, P. Waclawik, R. Kukutsch, Rotation of principal axes and changes of stress due to mine-induced stresses 1. Can. Geotech. J. 52(10), 1440–1447 (2015)CrossRefGoogle Scholar
  4. 4.
    B. Shen, A. King, H. Guo, Displacement, stress and seismicity in roadway roofs during mining-induced failure. Int. J. Rock Mech. Min. Sci. 45(5), 672–688 (2008)CrossRefGoogle Scholar
  5. 5.
    L. Stas, J. Knejzlik, L. Palla, K. Soucek, P. Waclawik, Measurement of stress changes using a compact conical-ended borehole monitoring. Geotech. Test. J. 34(6), 685–693 (2011)Google Scholar
  6. 6.
    N. Zhang, N. Zhang, C. Han, D. Qian, F. Xue, Borehole stress monitoring analysis on advanced abutment pressure induced by longwall mining. Arab. J. Geosci. 7(2), 457–463 (2014)CrossRefGoogle Scholar
  7. 7.
    N. Hosseini, K. Oraee, K. Shahriar, K. Goshtasbi, 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)CrossRefGoogle Scholar
  8. 8.
    M. Shabanimashcool, C.C. Li, A numerical study of stress changes in barrier pillars and a border area in a longwall coal mine. Int. J. Coal Geol. 106, 39–47 (2013)CrossRefGoogle Scholar
  9. 9.
    Z.T. Bieniawski, Strata Control in Mining Engineering (Balkema, Rotterdam, 1987)Google Scholar
  10. 10.
    B.H.G. Brady, E.T. Brown, Rock Mechanics for Underground Mining (Springer, Berlin, 2013)Google Scholar
  11. 11.
    W. Yang, B. Lin, Y. Qu, Z. Li, C. Zhai, L. Jia, W. Zhao, Stress evolution with time and space during mining of a coal seam. Int. J. Rock Mech. Min. Sci. 48(7), 1145–1152 (2011)CrossRefGoogle Scholar
  12. 12.
    M. Kelly, X. Luo, S. Craig, Integrating tools for longwall geomechanics assessment. Int. J. Rock Mech. Min. Sci. 39(5), 661–676 (2002)CrossRefGoogle Scholar
  13. 13.
    R. Zhang, Z. Wang, J. Chen, Experimental research on the variational characteristics of vertical stress of soft coal seam in front of mining face. Saf. Sci. 50(4), 723–727 (2012)CrossRefGoogle Scholar
  14. 14.
    V. Hudeček, M. Stoniš, Forecast and prevention of coal and gas outbursts in the case of application of a new mining method-drilling of a coal pillar. Acta Montan. Slovaca 15(2), 102 (2010)Google Scholar
  15. 15.
    G.-X. Xie, K. Yang, Q.-M. Liu, Study on distribution laws of stress in inclined coal pillar for fully-mechanized top-coal caving face. Yanshilixue Yu Gongcheng Xuebao/Chin. J. Rock Mech. Eng. 25(3), 545–549 (2006)Google Scholar
  16. 16.
    X.F. Liu, E.Y. Wang, X.Q. He, Time series analysis of electromagnetic radiation precursor of rock burst in gob-surrounded coal pillar. J. China Coal Soc. 35, 15–18 (2010)Google Scholar
  17. 17.
    Y. Jiang, H. Wang, S. Xue, Y. Zhao, J. Zhu, X. Pang, Assessment and mitigation of coal bump risk during extraction of an island longwall panel. Int. J. Coal Geol. 95, 20–33 (2012)CrossRefGoogle Scholar
  18. 18.
    J.-X. Yang, C.Y. Liu, B. Yu, Effects of load distribution exerting on coal pillars on the stress and energy distribution of the floor strata. Acta Montan. Slovaca 21(2), 102–112 (2016)Google Scholar
  19. 19.
    T. Zhao, W. Guo, Y. Tan, C. Lu, C. Wang, Case histories of rock bursts under complicated geological conditions. Bull. Eng. Geol. Environ. (2017). CrossRefGoogle Scholar
  20. 20.
    Anon, Basic design of Tabas Coal Mine Project, Iran. Appendix A, Rating of rock exposures & Appendix G, Geotechnical Data. Basic Design Report (2005)Google Scholar
  21. 21.
    I. Canbulat, T. Dlokweni, Rating system for coal mine roofs. Safety in Mine Research Advisory Committee, COL 812, September, p 1-82 (2002)Google Scholar
  22. 22.
    F. Itasca, Fast Lagrangian Analysis of Continua (Itasca Consulting Group Inc., Minneapolis, MN, 2000)Google Scholar
  23. 23.
    A. Elyasi, M. Javadi, T. Moradi, J. Moharrami, S. Parnian, M. Amrac, Numerical modeling of an umbrella arch as a pre-support system in difficult geological conditions: a case study. Bull. Eng. Geol. Env. 75(1), 211–221 (2016)CrossRefGoogle Scholar
  24. 24.
    M.E.D. Fama, R. Trueman, M.S. Craig, Two-and three-dimensional elasto-plastic analysis for coal pillar design and its application to highwall mining. Int. J. Rock Mech. Min. Sci. Geomech. Abstr. 32, 215–225 (1995)CrossRefGoogle Scholar
  25. 25.
    E. Hoek, Estimating Mohr–Coulomb friction and cohesion values from the Hoek–Brown failure criterion. Int. J. Rock Mech. Min. Sci. Geomech. Abstr. 27, 227–229 (1990)CrossRefGoogle Scholar
  26. 26.
    S. Pietruszczak, Z. Mroz, Numerical analysis of elastic-plastic compression of pillars accounting for material hardening and softening. Int. J. Rock Mech. Min. Sci. Geomech. Abstr. 17, 199–207 (1980)CrossRefGoogle Scholar
  27. 27.
    E. Sandoval, A. Bobet, Effect of frequency and flexibility ratio on the seismic response of deep tunnels. Undergr. Sp. 2, 125–133 (2017)CrossRefGoogle Scholar
  28. 28.
    R. Singh, P.R. Sheorey, D.P. Singh, Stability of the parting between coal pillar workings in level contiguous seams. Int. J. Rock Mech. Min. Sci. 39(1), 9–39 (2002)CrossRefGoogle Scholar
  29. 29.
    H. Zhu, M. Cui, X. Liu, K.S. Yang, D.Y. Kim, Backward analysis of staged construction of big deep pit foundation and analysis of its stability. J. Build. Struct. 6, 10 (2000)Google Scholar
  30. 30.
    S.A. Badr, Numerical Analysis of Coal Yield Pillars at Deep Longwall Mines (Colorado School of Mines, Golden, CO, 2004)Google Scholar
  31. 31.
    D.M. Pappas, C. Mark, Behavior of simulated longwall gob material (US Department of the Interior, Bureau of Mines, 1993)Google Scholar
  32. 32.
    M.D.G. Salamon, Mechanism of caving in longwall coal mining MDG Salamon, in Rock Mechanics Contributions and Challenges: Proceedings of the 31st US Symposium on Rock Mechanics, p. 161 (1990)Google Scholar

Copyright information

© ASM International 2018

Authors and Affiliations

  • Mohammad Javadi
    • 1
  • Gholamreza Saeedi
    • 1
    Email author
  • Kourosh Shahriar
    • 2
  1. 1.Mining Engineering DepartmentShahid Bahonar University of KermanKermanIran
  2. 2.Department of Mining and Metallurgical EngineeringAmirkabir University of TechnologyTehranIran

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