Geomechanics and Engineering

Techno-Press (테크노프레스)
권호 표지
DOI QR코드

DOI QR Code

Analysis of the failure mechanism and support technology for the Dongtan deep coal roadway

  • Chen, Miao (State Key Laboratory for Geomechanics and Deep Underground Engineering, School of Mechanics and Civil Engineering, China University of Mining and Technology) ;
  • Yang, Sheng-Qi (State Key Laboratory for Geomechanics and Deep Underground Engineering, School of Mechanics and Civil Engineering, China University of Mining and Technology) ;
  • Zhang, Yuan-Chao (State Key Laboratory for Geomechanics and Deep Underground Engineering, School of Mechanics and Civil Engineering, China University of Mining and Technology) ;
  • Zang, Chuan-Wei (College of Mining and Safety Engineering, Shandong University of Science and Technology)
  • Received : 2016.01.21
  • Accepted : 2016.05.12
  • Published : 2016.09.25
⟨ Previous Next ⟩

Abstract

The stability of deep coal roadways with large sections and thick top coal is a typical challenge in many coal mines in China. The innovative Universal Discrete Element Code (UDEC) trigon block is adopted to create a numerical model based on a case study at the Dongtan coal mine in China to better understand the failure mechanism and stability control mechanism of this kind of roadway. The failure process of an unsupported roadway is simulated, and the results suggest that the deformation of the roof is more serious than that of the sides and floor, especially in the center of the roof. The radial stress that is released is more intense than the tangential stress, while a large zone of relaxation appears around the roadway. The failure process begins from partial failure at roadway corners, and then propagates deeper into the roof and sides, finally resulting in large deformation in the roadway. A combined support system is proposed to support roadways based on an analysis of the simulation results. The numerical simulation and field monitoring suggest that the availability of this support method is feasible both in theory and practice, which can provide helpful references for research on the failure mechanisms and scientific support designing of engineering in deep coal mines.

Keywords

Acknowledgement

Supported by : National Natural Science Foundation of of Jiangsu Province for Distinguished Young Scholars, National Nature Science Foundation of China, Central Universities

References

  1. Boon, C.W., Houlsby, G.T. and Utili, S. (2015), "Designing tunnel support in jointed rock masses via the DEM", Rock. Mech. Rock. Eng., 48(2), 603-632. https://doi.org/10.1007/s00603-014-0579-8
  2. Brady, B.H.G. and Brown, E.T. (2006), Rock Mechanics for Underground Mining, (3nd Ed.), Springer Science and Business Media, New York, NY, USA.
  3. Chen, X.G., Zhang, Q.Y., Wang, Y., Li, S.C. and Wang, H.P. (2013), "In situ observation and model test on zonal disintegration in deep tunnels", J. Test. Eval., 41(6), 1-11.
  4. Christianson, M., Board, M. and Rigby, D. (2006), "UDEC simulation of triaxial testing of lithophysal tuffs", Proceedings of the 41st U.S. Rock on Rock Mechanics Symposium, Alexandria, USA, June.
  5. Gao, F.Q. and Stead, D. (2014), "The application of a modified Voronoi logic to brittle fracture modelling at the laboratory and field scale", Int. J. Rock. Mech. Min. Sci., 68, 1-14.
  6. Gao, F.Q., Stead, D. and Kang, H. (2014a), "Numerical simulation of squeezing failure in a coal mine roadway due to mining-induced stresses", Rock Mech. Rock Eng., 44(9), 1-11.
  7. Gao, F.Q., Stead, D. and Kang, H. (2014b), "Simulation of roof shear failure in coal mine roadways using an innovative UDEC Trigon approach", Comput. Geotech., 61, 33-41. https://doi.org/10.1016/j.compgeo.2014.04.009
  8. He, M.C. (2011), "Physical modeling of an underground roadway excavation in geologically $45^{\circ}$ inclined rock using infrared thermography", Eng. Geol., 121(3), 165-176. https://doi.org/10.1016/j.enggeo.2010.12.001
  9. He, M.C., Gong, W.L., Zhai, H.M. and Zhang, H.P. (2010a), "Physical modeling of deep ground excavation in geologically horizontal strata based on infrared thermography", Tunn. Undergr. Sp. Tech., 25(4), 366-376. https://doi.org/10.1016/j.tust.2010.01.012
  10. He, M.C., Jia, X., Gong, W.L. and Faramarzi, L. (2010b), "Physical modeling of an underground roadway excavation in vertically stratified rock using infrared thermography", Int. J. Rock. Mech. Min. Sci., 47(7), 1212-1221. https://doi.org/10.1016/j.ijrmms.2010.06.020
  11. Itasca Consulting Group, Inc. (2004), UDEC-Universal distinct element code; Version 4.0 Manual, Itasca Consulting Group, Inc., Minneapolis, MN, USA.
  12. Jing, L.R. (2003), "A review of techniques, advances and outstanding issues in numerical modelling for rock mechanics and rock engineering", Int. J. Rock. Mech. Min. Sci., 40(3), 283-353. https://doi.org/10.1016/S1365-1609(03)00013-3
  13. Jing, L.R. and Hudson, J.A. (2002), "Numerical methods in rock mechanics", Int. J. Rock. Mech. Min. Sci., 39(4), 409-427. https://doi.org/10.1016/S1365-1609(02)00065-5
  14. Jing, H.W., Yang, S.Q., Zhang, M.L., Xu, G.A. and Chen, K.F. (2014), "An experimental study on anchorage strength and deformation behavior of large-scale jointed rock mass", Tunn. Undergr. Sp. Tech., 43, 184-197. https://doi.org/10.1016/j.tust.2014.05.006
  15. Kang, H.P. (2014), "Support technologies for deep and complex roadways in underground coal mines: A review", Int. J. Coal Sci. Technol., 1(3), 261-277. https://doi.org/10.1007/s40789-014-0043-0
  16. Kang, H.P., Lin, J. and Fan, M.J. (2015), "Investigation on support pattern of a coal mine roadway within soft rocks-A case study", Int. J. Coal Geol., 140, 31-40. https://doi.org/10.1016/j.coal.2015.01.003
  17. Karampinos, E., Hadjigeorgiou, J., Hazzard, J. and Turcotte, P. (2015), "Discrete element modelling of the buckling phenomenon in deep hard rock mines", Int. J. Rock. Mech. Min. Sci., 80, 346-356.
  18. Kazerani, T. (2013), "Effect of micromechanical parameters of microstructure on compressive and tensile failure process of rock", Int. J. Rock. Mech. Min. Sci., 64, 44-55.
  19. Kazerani, T. and Zhao, J. (2010), "Micromechanical parameters in bonded particle method for modelling of brittle material failure", Int. J. Numer. Anal. Met., 34(18), 1877-1895. https://doi.org/10.1002/nag.884
  20. Li, S.J., Yu, H., Liu, Y.X. and Wu, F.J. (2008), "Results from in-situ monitoring of displacement, bolt load, and disturbed zone of a powerhouse cavern during excavation process", Int. J. Rock. Mech. Min. Sci., 45(8), 1519-1525. https://doi.org/10.1016/j.ijrmms.2008.01.012
  21. Li, S.C., Wang, Q., Wang, H.T., Jiang, B., Wang, D.C., Zhang, B., Li, Y. and Ruan, G.Q. (2015), "Model test study on surrounding rock deformation and failure mechanisms of deep roadways with thick top coal", Tunn. Undergr. Sp. Tech., 47, 52-63. https://doi.org/10.1016/j.tust.2014.12.013
  22. Meguid, M.A., Saada, O., Nunes, M.A. and Mattar, J. (2008), "Physical modeling of tunnels in soft ground: A review", Tunn. Undergr. Sp. Tech., 23(2), 185-198. https://doi.org/10.1016/j.tust.2007.02.003
  23. Meng, X.J. (2013), "Surrounding rock control theory and technology of large-section entry driving along goaf in fully mechanized caving face when deep mining", Ph.D. Dissertation; Shandong University of Science and Technology, Qingdao, China. [In Chinese]
  24. Shen, B.T. (2014), "Coal Mine Roadway Stability in Soft Rock: A Case Study", Rock. Mech. Rock. Eng., 47(6), 2225-2238. https://doi.org/10.1007/s00603-013-0528-y
  25. Shen, B.T., King, A. and Guo, H. (2008), "Displacement, stress and seismicity in roadway roofs during mining-induced failure", Int. J. Rock. Mech. Min. Sci., 45(5), 672-88. https://doi.org/10.1016/j.ijrmms.2007.08.011
  26. Singh, M. and Seshagiri, R.K. (2005), "Empirical methods to estimate the strength of jointed rock masses", Eng. Geol., 77(1), 127-137. https://doi.org/10.1016/j.enggeo.2004.09.001
  27. Tan, X. and Konietzky, H. (2014), "Brazilian split tests and numerical simulation by discrete element method for heterogeneous gneiss with bedding structure", Chinese Journal of Rock Mechanics and Engineering, 33(5), 938-946. [In Chinese]
  28. Yang, S.Q. (2015), "An experimental study on fracture coalescence characteristics of brittle sandstone specimens combined various flaws", Geomech. Eng., Int. J., 8(4), 541-557. https://doi.org/10.12989/gae.2015.8.4.541
  29. Yang, S.Q., Jiang, Y.Z., Xu, W.Y. and Chen, X.Q. (2008), "Experimental investigation on strength and failure behavior of pre-cracked marble under conventional triaxial compression", Int. J. Solids Struct., 45(17), 4796-4819. https://doi.org/10.1016/j.ijsolstr.2008.04.023
  30. Zhang, L. and Einstein, H.H. (2004), "Using RQD to estimate the deformation moduli of rock masses", Int. J. Rock. Mech. Min. Sci., 41(2), 337-341. https://doi.org/10.1016/S1365-1609(03)00100-X

Cited by

  1. Discrete Element Simulation of Roadway Stability in an Efflorescent Oxidation Zone vol.2018, pp.1687-8094, 2018, https://doi.org/10.1155/2018/4183748
  2. Deformation characteristics and stability control of a gateroad in fully mechanized mining with large mining height vol.11, pp.24, 2018, https://doi.org/10.1007/s12517-018-4087-0
  3. Optimization study on roof break direction of gob-side entry retaining by roof break and filling in thick-layer soft rock layer vol.13, pp.2, 2017, https://doi.org/10.12989/gae.2017.13.2.195
  4. Mechanical behavior of rock-coal-rock specimens with different coal thicknesses vol.15, pp.4, 2016, https://doi.org/10.12989/gae.2018.15.4.1017
  5. Coordinated supporting method of gob-side entry retaining in coal mines and a case study with hard roof vol.15, pp.6, 2016, https://doi.org/10.12989/gae.2018.15.6.1173
  6. Rock fracturing mechanisms around underground openings vol.16, pp.1, 2018, https://doi.org/10.12989/gae.2018.16.1.035
  7. Investigation of the Roof Presplitting and Rock Mass Filling Approach on Controlling Large Deformations and Coal Bumps in Deep High-Stress Roadways vol.16, pp.4, 2016, https://doi.org/10.1590/1679-78255586
  8. Design of initial support required for excavation of underground cavern and shaft from numerical analysis vol.17, pp.6, 2016, https://doi.org/10.12989/gae.2019.17.6.573
  9. Acoustic Emission Simulation on Coal Specimen Subjected to Cyclic Loading vol.2020, pp.None, 2020, https://doi.org/10.1155/2020/3798292
  10. Stabilization Mechanism and Safety Control Strategy of the Deep Roadway with Complex Stress vol.2020, pp.None, 2016, https://doi.org/10.1155/2020/8829651
  11. A Supporting Design Method When Longwall FaceStrides across and Passes through a Roadway vol.2020, pp.None, 2020, https://doi.org/10.1155/2020/8891427
  12. Failure Mechanisms and Modes of Tunnels in Monoclinic and Soft-Hard Interbedded Rocks: A Case Study vol.24, pp.4, 2016, https://doi.org/10.1007/s12205-020-1324-3
  13. Study on the distribution law of stress deviator below the floor of a goaf vol.21, pp.3, 2016, https://doi.org/10.12989/gae.2020.21.3.301
  14. Numerical Analysis of the Width Design of a Protective Pillar in High-Stress Roadway: A Case Study vol.2021, pp.None, 2021, https://doi.org/10.1155/2021/5533364
  15. Deformation Evolution and Failure Mechanism of Monoclinic and Soft-Hard Interbedded Strata: Study of Muzhailing Tunnel vol.35, pp.5, 2016, https://doi.org/10.1061/(asce)cf.1943-5509.0001605
  16. Modeling the behavior of a coal pillar rib using Bonded Block Models with emphasis on ground-support interaction vol.148, pp.None, 2016, https://doi.org/10.1016/j.ijrmms.2021.104965