Geomechanics and Engineering

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A case study on asymmetric deformation mechanism of the reserved roadway under mining influences and its control techniques

  • Li, Chen (School of Energy & Mining Engineering, China University of Mining and Technology (Beijing)) ;
  • Wu, Zheng (School of Energy & Mining Engineering, China University of Mining and Technology (Beijing)) ;
  • Zhang, Wenlong (School of Energy & Mining Engineering, China University of Mining and Technology (Beijing)) ;
  • Sun, Yanhua (School of Civil Engineering, Guizhou University of Engineering Science) ;
  • Zhu, Chun (School of Earth Sciences and Engineering, Hohai University) ;
  • Zhang, Xiaohu (School of Civil Engineering, Guizhou University of Engineering Science)
  • Received : 2020.05.25
  • Accepted : 2020.08.04
  • Published : 2020.09.10
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Abstract

The double-lane arrangement model is frequently used in underground coal mines because it is beneficial to improve the mining efficiency of the working face. When the double-lane arrangement is used, the service time of the reserved roadway increases by twice, which causes several difficulties for the maintenance of the roadway. Given the severe non-uniform deformation of the reserved roadway in the Buertai Coal Mine, the stress distribution law in the mining area, the failure characteristics of roadway and the control effect of support resistance (SR) were systematically studied through on-site monitoring, FLAC 3D numerical simulation, mechanical model analysis. The research shows that the deformation and failure of the reserved roadway mainly manifested as asymmetrical roof sag and floor heave in the region behind the working face, and the roof dripping phenomenon occurred in the severe roof sag area. After the coal is mined out, the stress adjustment around goaf will happen to some extent. For example, the magnitude, direction, and confining pressure ratio of the principal stress at different positions will change. Under the influence of high-stress rotation, the plastic zone of the weak surrounding rock is expanded asymmetrically, which finally leads to the asymmetric failure of roadway. The existing roadway support has a limited effect on the control of the stress field and plastic zone, i.e., the anchor cable reinforcement cannot fully control the roadway deformation under given conditions. Based on obtained results, using roadway grouting and advanced hydraulic support during the secondary mining of the panel 22205 is proposed to ensure roadway safety. This study provides a reference for the stability control of roadway with similar geological conditions.

Keywords

References

  1. Adach-Pawelus, K. (2017), "Influence of the roof movement control method on the stability of remnant", IOP Conf. Ser. Earth Environ. Sci., 95, 42010-42022. https://doi.org/10.1088/1755-1315/95/4/042022.
  2. Cai, M.F. (2013), Rock Mechanics and Engineering, Science Press, Beijing, China.
  3. Carranza-Torres, C. (2009), "Analytical and numerical study of the mechanics of rock bolt reinforcement around tunnels in rock masses", Rock Mech. Rock Eng., 42(2), 175-228. https://doi.org/10.1007/s00603-009-0178-2.
  4. Chen, S.J., Yin, D.W., Jiang, N., Wang, F. and Zhao, Z.H. (2019), "Mechanical properties of oil shale-coal composite samples", Int. J. Rock Mech. Min. Sci., 123, 104120. https://doi.org/10.1016/j.ijrmms.2019.104120.
  5. Choudhary, A.K., Pandit, B., Babu and G.L.S. (2020), "Three-dimensional analysis of vertical square anchor plate in cohesionless soil", Geomech. Geoeng., 15(1), 1-9. https://doi.org/10.1080/17486025.2019.1601265.
  6. Coggan, J., Gao, F., Stead, D. and Elmo, D. (2012), "Numerical modelling of the effects of weak immediate roof lithology on coal mine roadway stability", Int. J. Coal Geol., 90, 100-109. https://doi.org/10.1016/j.coal.2011.11.003.
  7. Feng, G., Kang, Y., Wang, X.C., Hu, Y.Q. and Li, X.H. (2020), "Investigation on the failure characteristics and fracture classification of shale under brazilian test conditions", Rock Mech. Rock Eng., 53, 3325-3340. https://doi.org/10.1007/s00603-020-02110-6.
  8. Giraldo Zapata, V.M., Botero Jaramillo, E. and Ossa Lopez, A. (2018), "Implementation of a model of elastoviscoplastic consolidation behavior in Flac 3D", Comput. Geotech., 98, 132-143. https://doi.org/10.1016/j.compgeo.2017.11.011.
  9. Guo, X.F., Ma, N.J., Zhao, X.D. and Zhao, Z.Q. (2016), "General shapes and criterion for surrounding rock mass plastic zone of round roadway", J. China Coal Soc., 41, 1871-1877. https://doi.org/10.13225/j.cnki.jccs.2016.0787.
  10. Guo, X.F., Zhao, Z.Q., Gao, X., Wu, X.Y. and Ma, N.J. (2019), "Analytical solutions for characteristic radii of circular roadway surrounding rock plastic zone and their application", Int. J. Min. Sci. Technol., 29(2), 263-272. https://doi.org/10.1016/j.ijmst.2018.10.002.
  11. Hill, R. (1998), The Mathematical Theory of Plasticity, Oxford University Press, New York, U.S.A.
  12. Hu, S.C., Tan, Y.L., Zhou, H., Ru, W.K., Ning, J.G., Wang, J., Huang, D.M. and Li, Z. (2020), "Anisotropic modeling of layered rocks incorporating planes of weakness and volumetric stress", Energy Sci. Eng., 8(3), 789-803. https://doi.org/10.1002/ese3.551.
  13. Huang, H., Babadagli, T., Chen, X., Li, H.Z. and Zhang, Y.M. (2020), "Performance comparison of novel chemical agents for mitigating water-blocking problem in tight gas sandstones", SPE Reserv. Eval. Eng., 1-9. https://doi.org/10.2118/199282-PA.
  14. Islavath, S.R. and Deb. D. (2018), "Stability analysis of underground stope pillars using three dimensional numerical modelling techniques", Int. J. Min. Miner. Eng., 9(3), 198-215. https://doi.org/10.1504/IJMME.2018.096103.
  15. Jia, H.S., Qiao, A.Z. and Jiang, W.Y. (2016), "Deformation-failure characteristics and supporting method of mining tunnel roof in Buertai mine", J. Henan Polytech. Univ. Nat. Sci., 35, 338-344. https://doi.org/10.16186/j.cnki.1673-9787.2016.03.008.
  16. Jia, H.S., Wang, L.Y., Fan, K., Peng, B. and Pan, K. (2019), "Control technology of soft rock floor in mining roadway with coal pillar protection: A case study", Energies, 12(15), 3009. https://doi.org/10.3390/en12153009.
  17. Jiang, L.S., Sainoki, A., Mitri, H.S., Ma, N.J. and Liu, H.T. (2016), "Influence of fracture-induced weakening on coal mine gateroad stability", Int. J. Rock Mech. Min. Sci., 88, 307-317. https://doi.org/10.1016/j.ijrmms.2016.04.017.
  18. Jiang, N., Wang, C.X., Pan, H.Y., Yin, D. and Ma, J. (2020), "Modeling study on the influence of the strip filling mining sequence on mining-induced failure", Energy Sci. Eng., 8(6), 1-17. https ://doi.org/10.1002/ese3.660.
  19. Kang, H.P., Wu, L., Gao, F.Q., Lv, H.W. and Li, J.Z. (2019), "Field study on the load transfer mechanics associated with longwall coal retreat mining", Int. J. Rock Mech. Min. Sci., 124, 104-114. https://doi.org/10.1016/j.ijrmms.2019.104141.
  20. Kang, H.P., Yan, L.X. and Guo, X.P. (2012), "Characteristics of surrounding rock deformation and reinforcement technology of retained entry in working face with multi-entry layout", Chin. J. Rock Mech. Eng., 31, 2022-2036. https://doi.org/10.3969/j.issn.1000-6915.2012.10.007.
  21. Kang, J.Z., Shen, W.L., Bai, J.B., Yan, S. and Wang, X.Y. (2017), "Influence of abnormal stress under a residual bearing coal pillar on the stability of a mine entry", Int. J. Min. Sci. Technol., 27(6), 945-954. https://doi.org/10.1016/j.ijmst.2017.06.012.
  22. Kozlowska, M., Orlecka-Sikora, B., Rudzinski, A., Cielesta, S. and Mutke, G. (2016), "Atypical evolution of seismicity patterns resulting from the coupled natural, human-induced and coseismic stresses in a longwall coal mining environment", Int. J. Rock Mech. Min. Sci., 86, 5-15. https://doi.org/10.1016/j.ijrmms.2016.03.024.
  23. Lee, Y. and Pietruszczak, S. (2008), "A new numerical procedure for elasto-plastic analysis of a circular opening excavated in a strain-softening rock mass", Tunn. Undergr. Sp. Tech., 23(5), 588-599. https://doi.org/10.1016/j.tust.2007.11.002.
  24. Li, C., Zhang, W.L., Wang, N. and Hao, C. (2019), "Roof stability control based on plastic zone evolution under mining", J. Min. Saf. Eng., 36, 753-761. https://doi.org/10.13545/j.cnki.jmse.2019.04.014.
  25. Li, Y.E., Guo, X.F., Ma, J. and Huo, T.H. (2017), "Extension characteristics of the "Butterfly-shaped" plastic zone and stability control of deep mining roadway in Xingdong mine", J. Min. Sci. Technol., 2(6), 566-575. https://doi.org/10.19606/j.cnki.jmst.2017.06.007
  26. Lin, C.D., Lu, S.L. and Shi, Y.W. (2000), "Study on supporting effect of soft roof bolt in coal roadway", J. China Coal Soc., 25, 482-485. https://doi.org/10.13225/j.cnki.jccs.2000.05.008.
  27. Liu, D.K., Gu, Z.L., Liang, R.X., Su, J.W., Ren, D.Z., Chen, B., Huang, C.Q. and Yang, C. (2020), "Impacts of pore-throat system on fractal characterization of tight sandstones", Geofluids, 9, 1-17. https://doi.org/10.1155/2020/4941501.
  28. Liu, H.T., Wu, X.Y., Hao, Z. and Zhao, X.D. (2017), "Evolution law and stability control of plastic zones of retained entry of working face with double roadways layout", J. Min. Saf. Eng., 32(4), 689-697. https://doi.org/10.13545/j.cnki.jmse.2017.04.013.
  29. Liu, N.F., Li, N., Li, GF., Zhang, Z.Q. and Mu, Y.H. (2018), "Deformation and collapse mechanisms of water-rich soil tunnels", Soil Mech. Found. Eng., 54(6), 384-394. https://doi.org/10.1007/s11204-018-9485-5.
  30. Ma, N.J., Li, J. and Zhao, Z.Q. (2015), "Distribution of the deviatoric stress field and plastic zone in circular roadway surrounding rock", J. China U. Min. Technol., 44(2), 206-213. https://doi.org/10.13247/j.cnki.jcumt.000309.
  31. Mahdevari, S., Shahriar, K., Sharifzadeh, M. and Tannant, D.D. (2016), "Assessment of failure mechanisms in deep longwall faces based on mining-induced seismicity", Arab. J. Geosci., 9(18), 709. https://doi.org/10.1007/s12517-016-2743-9.
  32. Nam, K., Kim, J., Kwak, D., Rehman, H. and Yoo, H. (2020), "Structure damage estimation due to tunnel excavation based on indoor model test", Geomech. Eng., 21(2), 95-102. https://doi.org/10.12989/gae.2020.21.2.095.
  33. Qian, M.G., Shi, P.W. and Xu, J.L. (2010), Mining Pressure and Strata Control, China University of Mining and Technology Press, Xuzhou, China.
  34. Ren, D.Z., Zhou, D.S., Liu, D.K., Dong, F.J., Ma, S.W. and Huang, H. (2019), "Formation mechanism of the Upper Triassic Yanchang Formation tight sandstone reservoir in Ordos Basin-Take Chang 6 reservoir in Jiyuan oil field as an example", J. Petrol. Sci. Eng., 178, 497-505. https://doi.org/10.1016/j.petrol.2019.03.021.
  35. Ren, F.Q., Zhu, C. and He, M.C. (2020), "Moment tensor analysis of acoustic emissions for cracking mechanisms during schist strain burst", Rock Mech. Rock Eng., 53(1), 153-170. https://doi.org/10.1007/s00603-019-01897-3.
  36. Rezaei, M., Hossaini, M.F. and Majdi, A. (2015), "Determination of longwall mining-induced stress using the strain energy method", Rock Mech. Rock Eng., 48(6), 2421-2433. https://doi.org/10.1007/s00603-014-0704-8.
  37. Shan, P.F. and Lai, X.P. (2020), "An associated evaluation methodology of initial stress level of coal-rock masses in steeply inclined coal seams, Urumchi coal field, China", Eng. Comput., 37, 2177-2192. https://doi.org/10.1108/EC-07-2019-0325.
  38. Shi, G.C., Yang, X.J., Yu, H.C. and Zhu, C. (2018), "Acoustic emission characteristics of creep fracture evolution in double-fracture fine sandstone under uniaxial compression", Eng. Fract. Mech., 210, 13-28. https://doi.org/10.1016/j.engfracmech.2018.09.004.
  39. Wang, C.X., Jiang, N., Shen, B.T., Sun, X.Z., Zhang, B.C., Lu, Y. and Li, Y.Y. (2019), "Distribution and evolution of residual voids in longwall old goaf", Geomech. Eng., 19(2), 105-114. https://doi.org/10.12989/gae.2019.19.2.105.
  40. Wang, C.X., Shen, B.T., Chen, J.T., Tong, W.X., Jiang, Z., Liu, Y. and Li, Y.Y. (2020a), "Compression characteristics of filling gangue and simulation of mining with gangue backfilling: An experimental investigation", Geomech. Eng., 20(6), 485-495. https://doi.org/10.12989/gae.2020.20.6.485.
  41. Wang, H.Y., Dyskin, A., Dight, P., Pasternak, E. and Hsieh, A. (2018), "Review of unloading tests of dynamic rock failure in compression", Eng. Fract. Mech., 225, 106289 https://doi.org/10.1016/j.engfracmech.2018.12.022.
  42. Wang, H.Y., Dyskin, A., Pasternak, E. and Dight. P. (2020b), "3D crack growth in biaxial compression: Influence of shape and inclination of initial cracks", Rock Mech. Rock Eng., 53, 3161-3183. https://doi.org/10.1007/s00603-020-02089-0.
  43. Wang, S.W., Mao, D.B., Pan, J.F. and Chen, X.G. (2015), "Measurement on the whole process of abutment pressure evolution and microseismic activities at the lateral strata of goaf", J. China Coal Soc., 40(12), 2772-2779. https://doi.org/10.13225/j.cnki.jccs.2015.0080.
  44. Wang, W.J., Dong, E.Y. and Zhao, Z.W. (2020c), "Experimental study on mechanical properties of anchorage body and on anchorage mechanism", J. China Coal Soc., 45, 82-89. https://doi.org/10.13225/j.cnki.jccs.YG19.1436.
  45. Wang, W.J., Yuan, C., Yu, W.J. and Wu, H. (2016), "Stability control method of surrounding rock in deep roadway with large deformation", J. China Coal Soc., 41, 2921-2931. https://doi.org/10.13225/j.cnki.jccs.2016.1115.
  46. Wang, X., Yuan, W., Yan, Y.T. and Zhang, X. (2020d), "Scale effect of mechanical properties of jointed rock mass: A numerical study based on particle flow code", Geomech. Eng., 21(3), 259-268. https://doi.org/10.12989/gae.2020.21.3.259.
  47. Xie, S.R., Pan, H., Zeng, J.C., Wang, E. and Chen, D. (2019), "A case study on control technology of surrounding rock of a large section chamber under a 1200-m deep goaf in Xingdong coal mine, China", Eng. Fail. Anal., 104, 112-125. https://doi.org/10.1016/j.engfailanal.2019.05.039.
  48. Xu, Z.L. (2013), Elasticity, Higher Education Press, Beijing, China.
  49. Yang, C., Lu, S.L. and Jiang, Y.D. (2000), "The controlling effect of support resistance on the deformation of surrounding rock with different lithology", J. China U. Min. Technol., 29, 170-173. https://doi.org/CNKI:SUN:ZGKD.0.2000-02-014. https://doi.org/10.3321/j.issn:1000-1964.2000.02.015
  50. Yao, Q. (2011), "Researches on strength weakening mechanism and control of water-enriched roof of roadway", Ph.D. Dissertation, China University of Mining and Technology, Xuzhou, China.
  51. Yin, Q., Ma, G.W., Jing, H.W., Wang, H.D., Su, H.J., Wang, Y.C. and Liu, R.C. (2017), "Hydraulic properties of 3D rough-walled fractures during shearing: An experimental study", J. Hydrol., 555, 169-184. https://doi.org/10.1016/j.jhydrol.2017.10.019.
  52. Yokota, Y., Zhao, Z., Nie, W., Date, K., Iwano, K. and Okada, Y. (2019), "Experimental and numerical study on the interface behaviour between the rock bolt and bond material", Rock Mech. Rock Eng., 52(3), 869-879. https://doi.org/10.1007/s00603-018-1629-4.
  53. Yuan, Y., Wang, W.J., Yuan, C. and Yu, W.J. (2016), "Large deformation failure mechanism of surrounding rock for gate road under dynamic pressure in deep coal mine", J. China Coal Soc., 41(12), 2940-2950. https://doi.org/10.13225/j.cnki.jccs.2016.1119.
  54. Zhang, N., Liu, W., Zhang, Y., Shan, P.F. and Shi, X.L. (2020a), "Microscopic pore structure of surrounding rock for underground strategic petroleum reserve (SPR) caverns in bedded rock salt", Energies, 13(7), 1565. https://doi.org/10.3390/en13071565.
  55. Zhang, W.L., Qu, X.C., Li, C., Xu, X, Zhang, S.L., Jin, G.D. and Wang, Y.L. (2019), "Fracture analysis of multi-hard roofs based on microseismic monitoring and control techniques for induced rock burst: A case study", Arab. J. Geosci., 12(24), 784. https://doi.org/10.1007/s12517-019-4972-1.
  56. Zhang, Y., Cao, S.G., Zhang, N. and Zhao, C.Z. (2020b), "The application of short-wall block backfill mining to preserve surface water resources in northwest China", J. Clean. Prod., 261, 121232. https://doi.org/10.1016/j.jclepro.2020.121232.
  57. Zhao, Z.Q. (2014), "Mechanism of surrounding rock deformation and failure and control method research in large deformation mining roadway", Ph.D. Dissertation, China University of Mining and Technology (Beijing), Beijing, China.
  58. Zhao, Z.Q., Ma, N.J. and Liu, H.T. (2018), "A butterfly failure theory of rock mass around roadway and its application prospect", J. China U. Min. Technol., 47, 969-978. https://doi.org/10.13247/j.cnki.jcumt.000922.

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