Geomechanics and Engineering

Techno-Press (테크노프레스)
권호 표지
DOI QR코드

DOI QR Code

Optimal pre-conditioning and support designs of floor heave in deep roadways

  • Wang, Chunlai (Faculty of Resources & Safety Engineering, China University of Mining & Technology) ;
  • Li, Guangyong (Faculty of Resources & Safety Engineering, China University of Mining & Technology) ;
  • Gao, Ansen (Faculty of Resources & Safety Engineering, China University of Mining & Technology) ;
  • Shi, Feng (Faculty of Resources & Safety Engineering, China University of Mining & Technology) ;
  • Lu, Zhijiang (Faculty of Resources & Safety Engineering, China University of Mining & Technology) ;
  • Lu, Hui (Faculty of Resources & Safety Engineering, China University of Mining & Technology)
  • Received : 2016.10.13
  • Accepted : 2017.09.03
  • Published : 2018.04.10
⟨ Previous Next ⟩

Abstract

In order to reduce deformation of roadway floor heave in deep underground soft rockmass, four support design patterns were analyzed using the Fast Lagrangian Analysis of Continua (FLAC)3D, including the traditional bolting (Design 1), the bolting with the backbreak in floor (Design 2), the full anchorage bolting with the backbreak in floor (Design 3) and the full anchorage bolting with the bolt-grouting backbreak in floor (Design 4). Results show that the design pattern 4, the full anchorage bolting with the bolt-grouting backbreak in floor, was the best one to reduce the deformation and failure of the roadway, the floor deformation was reduced at 88.38% than the design 1, and these parameters, maximum vertical stress, maximum horizontal displacement and maximum horizontal stress, were greater than 1.69%, 5.96% and 9.97%. However, it was perfectly acceptable with the floor heave results. The optimized design pattern 4 provided a meaningful and reliable support for the roadway in deep underground coal mine.

Keywords

Acknowledgement

Supported by : National Natural Science Foundation of China, Central Universities

References

  1. Abdellah, W. (2015), "Numerical modelling stability analyses of haulage drift in deep underground mines", J. Eng. Sci. Assiut Univ., 43(1), 71-81.
  2. Basirat, R., Niri, G.A. and Izadifard, R.A. (2015), "The effect of sand layer thickness and moisture content on underground structures behavior due to surface blasting", J. Eng. Res., 3(4), 31-42. https://doi.org/10.7603/s40632-015-0031-6
  3. Chang, J.C. and Xie, G.X. (2011), Investigation on Deformation and Failure Characteristics and Stability Control of Soft Rock Roadway Surrounding Rock in Deep Coal Mine, in Advanced Materials Research, Trans Tech Publications, 3711-3716.
  4. Chen, W., Konietzky, H. and Abbas, S. (2015), "Numerical simulation of time-independent and -dependent fracturing in sandstone", Eng. Geol., 193, 118-131.
  5. Chen, M., Yang, S.Q., Zhang, Y.C. and Zang, C.W. (2016), "Analysis of the failure mechanism and support technology for the Dongtan deep coal roadway", Geomech. Eng., 11(3), 401-420. https://doi.org/10.12989/gae.2016.11.3.401
  6. Chen, Y.J., Zhu, W.S., L,i S.C. and Zhang, X. (2016), "New reinforcement algorithms in discontinuous deformation analysis for rock failure", Geomech. Eng., 11(6), 787-803 https://doi.org/10.12989/gae.2016.11.6.787
  7. Feng, J.C., Li, H.J., Zhao, Z.C. and Zhang, W.L. (2013), New Type of High-Strength Support in Deep Soft Rock Roadway, in Advanced Materials Research, Trans Tech Publications, 1520-1525.
  8. Gao, F.Q. and Stead, D. (2014), "The application of a modified Voronoi logic to brittle fracture modelling at the laboratory and field scale", J. Rock Mech. Min. Sci., 68, 1-14.
  9. Gao, S.M., Chen, J.P., Zuo, C.Q., Wang, W. and Yang, S. (2016), "Structure optimization for the support system in soft rock tunnel based on numerical analysis and field monitoring", Geotech. Geol. Eng., 34(4), 1089-1099. https://doi.org/10.1007/s10706-016-0029-3
  10. Hamdi, P., Stead, D. and Elmo, D. (2014), "Damage characterization during laboratory strength testing: A 3D-finite-discrete element approach", Comput. Geotech., 60, 33-46. https://doi.org/10.1016/j.compgeo.2014.03.011
  11. Jia, J.P. and Wang, H.T. (2008), "Stability analysis of tunnel support based on site survey and numerical simulation", Proceedings of the 2008 International Workshop on Modelling, Simulation and Optimization WMSO'08, Hong Kong, December.
  12. 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", J. Coal Geol., 140, 31-40. https://doi.org/10.1016/j.coal.2015.01.003
  13. Kang, Y.S., Liu, Q.S., Gong, G.Q. and Wang, H.C. (2014), "Application of a combined support system to the weak floor reinforcement in deep underground coal mine", J. Rock Mech. Min. Sci., 71, 143-150.
  14. Kang, Z.Q., Yan, S.H. and Yan, Q. (2012), The Study of Numerical Simulation about Roadway Bolting and Reinforcement to Jointed Rock Mass, in Advanced Materials Research, 159-162.
  15. Lee, Y.J. (2016), "Determination of tunnel support pressure under the pile tip using upper and lower bounds with a superimposed approach", Geomech. Eng., 11(4): 587-605 https://doi.org/10.12989/gae.2016.11.4.587
  16. 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. Technol., 47, 52-63. https://doi.org/10.1016/j.tust.2014.12.013
  17. Liu, J.J., Lu, J.T. and Li, Z.H. (2010), "Numerical analysis for anchoring of surrounding rock of thick soft coal roadway", Proceedings of the 2010 International Conference on Mechanic Automation and Control Engineering (MACE), Wuhan, China, June.
  18. Lu, H.F. (2015), "Stress and displacement analysis of aerial oil & gas pipelines: A case study of Lantsang tunnel crossing project", J. Eng. Res., 3(3), 141-156.
  19. Lu, X.L., Liu, Q.S. and Su, P.F. (2010), "Deformation mechanism and support measures for stress-induced cracked rock mass of deep coal mine roadway", Proceedings of the International Symposium on Geomechanics and Geotechnics: From Micro to Macro, Shanghai, China, October.
  20. McKinnon, S.D. (2001), "Analysis of stress measurements using a numerical model methodology", J. Rock Mech. Min. Sci., 38(5), 699-709. https://doi.org/10.1016/S1365-1609(01)00037-5
  21. Saksala, T. (2014), "Rate-dependent embedded discontinuity approach incorporating heterogeneity for numerical modeling of rock fracture", Rock Mech. Rock Eng., 48(4), 1605-1622. https://doi.org/10.1007/s00603-014-0652-3
  22. Saleem, M. (2015), "Application of numerical simulation for the analysis and interpretation of pile-anchor system failure", Geomech. Eng., 9(6), 689-707 https://doi.org/10.12989/gae.2015.9.6.689
  23. 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
  24. Tian, Z.C., Dong, L.H. and Liu, Y.J. (2013), Numerical Simulation Analysis on Deformation Mechanism of Shallow-Buried Soft Rock Roadway, in Advanced Materials Research, Trans Tech Publications, 773-776.
  25. Vlachopoulos, N. and Diederichs, M.S. (2014), "Appropriate uses and practical limitations of 2D numerical analysis of tunnels and tunnel support response", Geotech. Geol. Eng., 32(2), 469-488. https://doi.org/10.1007/s10706-014-9727-x
  26. Xia, C.C., Gui, Y., Wang, W. and Du, S.G. (2014), "Numerical method for estimating void spaces of rock joints and the evolution of void spaces under different contact states", J. Geophys. Eng., 11(6), 65004-65015. https://doi.org/10.1088/1742-2132/11/6/065004
  27. Xing, H.L., Makinouchi, A. and Zhao, C. (2008), "Three-dimensional finite element simulation of large-scale nonlinear contact friction problems in deformable rocks", J. Geophys. Eng., 5(1), 27-36. https://doi.org/10.1088/1742-2132/5/1/003
  28. Yang, X.L. and Yan, R.M. (2015), "Collapse mechanism for deep tunnel subjected to seepage force in layered soils", Geomech. Eng., 8(5), 741-756 https://doi.org/10.12989/gae.2015.8.5.741
  29. Yu, W.J., Qu, Y.S. and Deng D.Q. (2013), Supporting Numerical Simulation of Roadway Surrounding Rock in Deep High Stress Based on Broken-Expand Deformation, in Applied Mechanics and Materials, Trans Tech Publications, 1310-1314.
  30. Zhang, B., Yu, X.L., Liu, N. and Zhu, F. (2013), Numerical Simulation Research on Deep Soft Rock Roadway, in Applied Mechanics and Materials, Trans Tech. Publications, 1439-1442.
  31. Zhang, M.W., Shimada, H., Sasaoka, T., Matsui, K. and Dou, L.M. (2014), "Evolution and effect of the stress concentration and rock failure in the deep multi-seam coal mining", Environ. Earth Sci., 72(3), 629-643. https://doi.org/10.1007/s12665-013-2985-8

Cited by

  1. Influence Law of Interbedded Strata and Their Collapse on the Mining of Extremely Thick Coal Seam under Goaf vol.2019, pp.None, 2018, https://doi.org/10.1155/2019/5171873
  2. A caving self-stabilization bearing structure of advancing cutting roof for gob-side entry retaining with hard roof stratum vol.21, pp.1, 2018, https://doi.org/10.12989/gae.2020.21.1.023