Geomechanics and Engineering

  • 제22권4호
  • /
  • Pages.349-359
  • /
  • 2020
  • /
  • 2005-307X(pISSN)
  • /
  • 2092-6219(eISSN)
테크노프레스 (Techno-Press)
권호 표지
DOI QR코드

DOI QR Code

Numerical investigation on overburden migration behaviors in stope under thick magmatic rocks

  • Xue, Yanchao (Center for Rock Instability and Seismicity Research, Northeastern University) ;
  • Wu, Quansen (Department of Chemistry and Chemical Engineering, Jining University) ;
  • Sun, Dequan (Engineering Laboratory of Deep Mine Rockburst Disaster Assessment)
  • 투고 : 2020.04.07
  • 심사 : 2020.07.22
  • 발행 : 2020.08.25
⟨ 이전 논문 다음 논문 ⟩

초록

Quantification of the influence of the fracture of thick magmatic rock (TMR) on the behavior of its overlying strata is a prerequisite to the understanding of the deformation behavior of the earth's surface in deep mining. A three-dimensional numerical model of a special geological mining condition of overlying TMR was developed to investigate the overburden movement and fracture law, and compare the influence of the occurrence horizon of TMR. The research results show that the movement of overlying rock was greatly affected by the TMR. Before the fracture of TMR, the TMR had shielding and controlling effects on the overlying strata, the maximum vertical and horizontal displacement values of overlying strata were 0.68 m and 0.062 m. After the fracture, the vertical and horizontal displacements suddenly increased to 3.06 m and 0.105 m, with an increase of 350% and 69.4%, respectively, and the higher the occurrence of TMR, the smaller the settlement of the overlying strata, but the wider the settlement span, the smaller the corresponding deformation value of the basin edge (the more difficult the surface to crack). These results are of tremendous importance for the control of rock strata and the revealing of surface deformation mechanism under TMR mining conditions in mines.

키워드

과제정보

The research described in this paper was financially supported by the National Natural Science Foundation of China (Grants 51704185), Natural Science Foundation of Shandong Province (Grants ZR2018PEE007).

참고문헌

  1. Chai, J., Lei, W.L., Du, W.G., Yuan, Q., Zhu, L., Zhang, D.D. and Li, H. (2019), "Experimental study on distributed optical fiber sensing monitoring for ground surface deformation in extrathick coal seam mining under ultra-thick conglomerate", Opt. Fiber Technol., 53, 12. https://doi.org/10.1016/j.yofte.2019.102006.
  2. Cheng, G., Chen, C., Ma, T., Liu, H. and Tang, C. (2017), "A case study on the strata movement mechanism and surface deformation regulation in Chengchao Underground Iron Mine", Rock Mech. Rock Eng., 50(4), 1011-1032. https://doi.org/10.1007/s00603-016-1132-8.
  3. Cheng, G.W., Chen, C.X., Li, L.C., Zhu, W.C., Yang, T.H., Dai, F. and Ren, B. (2018), "Numerical modelling of strata movement at footwall induced by underground mining", Int. J. Rock Mech. Min. Sci., 108, 142-156. https://doi.org/10.1016/j.ijrmms.2018.06.013.
  4. Do, T.N., Wu, J.H., Lin, H.M. (2017), "Investigation of sloped surface subsidence during inclined seam extraction in a jointed rock mass using discontinuous deformation analysis", Int. J. Geomech., 17(8), 14. https://doi.org/10.1061/(asce)gm.1943-5622.0000894.
  5. Driad-Lebeau, L., Lahaie, F., Al Heib, A., Josien, J.P., Bigarre, P. and Noirel, J.F. (2005), "Seismic and geotechnical investigations following a rockburst in a complex French mining district", Int. J. Coal Geol., 64(1-2), 66-78. https://doi.org/10.1016/j.coal.2005.03.017.
  6. Earlie, C., Masselink, G. and Russell, P. (2018), "The role of beach morphology on coastal cliff erosion under extreme waves", Earth Surf. Proc. Land., 43(6), 1213-1228. https://doi.org/10.1002/esp.4308.
  7. Fu, T.F., Xu, T., Heap, M.J., Meredith, P.G. and Mitchell, T.M. (2020), "Mesoscopic time-dependent behavior of rocks based on three-dimensional discrete element grain-based model", Comput. Geotech., 121. https://doi.org/10.1016/j.compgeo.2020.103472.
  8. Fuenkajorn, K. and Archeeploha, S. (2010), "Prediction of cavern configurations from subsidence data", Eng. Geol., 110(1-2), 21-29. https://doi.org/10.1016/j.enggeo.2009.10.003.
  9. Gao, F., Stead, D. and Coggan, J. (2014), "Evaluation of coal longwall caving characteristics using an innovative UDEC Trigon approach", Comput. Geotech., 55, 448-460. https://doi.org/10.1016/j.compgeo.2013.09.020.
  10. Ghabraie, B., Ghabraie, K., Ren, G. and Smith, J.V. (2017), "Numerical modelling of multistage caving processes: Insights from multi-seam longwall mining-induced subsidence", Int. J. Numer. Anal. Meth. Geomech., 41(7), 959-975. https://doi.org/10.1002/nag.2659.
  11. Guo, W.J. and Sun, W.B. (2012), "Surface discontinuous movement and deformation characteristics of strong rockburst mine", Chin. J. Rock Mech. Eng., 31, 3514-3519.
  12. 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.
  13. Jiang, L., Wu, Q., Wu, Q., Wang, P., Xue, Y., Kong, P. and Gong, B. (2019), "Fracture failure analysis of hard and thick key layer and its dynamic response characteristics", Eng. Fail. Anal., 98, 118-130. https://doi.org/10.1016/j.engfailanal.2019.01.008.
  14. Jirankova, E. (2012), "Utilisation of surface subsidence measurements in assessing failures of rigid strata overlying extracted coal seams", Int. J. Rock Mech. Min. Sci., 53, 111-119. https://doi.org/10.1016/j.ijrmms.2012.05.007.
  15. Ju, J.F. and Xu, J.L. (2013), "Structural characteristics of key strata and strata behaviour of a fully mechanized longwall face with 7.0 m height chocks", Int. J. Rock Mech. Min. Sci., 58, 46-54. https://doi.org/10.1016/j.ijrmms.2012.09.006.
  16. Li, Z., Xu, J., Ju, J., Zhu, W. and Xu, J. (2018), "The effects of the rotational speed of voussoir beam structures formed by key strata on the ground pressure of stopes", Int. J. Rock Mech. Min. Sci., 108, 67-79. https://doi.org/10.1016/j.ijrmms.2018.04.041.
  17. Lu, C.P., Liu, Y., Wang, H.Y. and Liu, P.F. (2016), "Microseismic signals of double-layer hard and thick igneous strata separation and fracturing", Int. J. Coal Geol., 160, 28-41. https://doi.org/10.1016/j.coal.2016.04.011.
  18. Palchik, V. (2002), "Influence of physical characteristics of weak rock mass on height of caved zone over abandoned subsurface coal mines", Environ. Geol., 42(1), 92-101. https://doi.org/10.1007/s00254-002-0542-y.
  19. Palchik, V. (2003), "Formation of fractured zones in overburden due to longwall mining", Environ. Geol., 44(1), 28-38. https://doi.org/10.1007/s00254-002-0732-7.
  20. Palchik, V. (2015), "Bulking factors and extents of caved zones in weathered overburden of shallow abandoned underground workings", Int. J. Rock Mech. Min. Sci., 79, 227-240. https://doi.org/10.1016/j.ijrmms.2015.07.005.
  21. Peng, S.S. and Chiang, H.S. (1984), Longwall Mining, Wiley, New York, U.S.A.
  22. Qian, M.G., Miao, X.X., Xu, J.L. and Mao, X.B. (2003), Study of Key Strata Theory in Ground Control, China University of Mining and Technology Press, Xuzhou, China.
  23. Rahimi, B., Sharifzadeh, M. and Feng, X.T. (2020), "Ground behaviour analysis, support system design and construction strategies in deep hard rock mining - Justified in Western Australian's mines", J. Rock Mech. Geotech. Eng, 12(1), 1-20. https://doi.org/10.1016/j.jrmge.2019.01.006.
  24. 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.
  25. Singh, G.S.P. and Singh, U.K. (2010), "Prediction of caving behavior of strata and optimum rating of hydraulic powered support for longwall workings", Int. J. Rock Mech. Min. Sci., 47(1), 1-16. https://doi.org/10.1016/j.ijrmms.2009.09.001.
  26. Sun, Y.J., Zuo, J.P., Karakus, M. and Wang, J.T. (2019), "Investigation of movement and damage of integral overburden during shallow coal seam mining", Int. J. Rock Mech. Min. Sci., 117, 63-75. https://doi.org/10.1016/j.ijrmms.2019.03.019.
  27. Tajdus, K., Misa, R. and Sroka, A. (2018), "Analysis of the surface horizontal displacement changes due to longwall panel advance", Int. J. Rock Mech. Min. Sci., 104, 119-125. https://doi.org/10.1016/j.ijrmms.2018.02.005.
  28. Villegas, T., Nordlund, E. and Dahner-Lindqvist, C. (2011), "Hangingwall surface subsidence at the Kiirunavaara Mine, Sweden", Eng. Geol., 121(1-2), 18-27. https://doi.org/10.1016/j.enggeo.2011.04.010.
  29. Wang, S.F., Li, X.B. and Wang, S.Y. (2017), "Separation and fracturing in overlying strata disturbed by longwall mining in a mineral deposit seam", Eng. Geol., 226, 257-266. https://doi.org/10.1016/j.enggeo.2017.06.015.
  30. Wang, W., Cheng, Y.P., Wang, H.F., Liu, H.Y., Wang, L., Li, W. and Jiang, J.Y. (2015), "Fracture failure analysis of hard-thick sandstone roof and its controlling effect on gas emission in underground ultra-thick coal extraction", Eng. Fail. Anal., 54, 150-162. https://doi.org/10.1016/j.engfailanal.2015.04.016.
  31. Xu, J.L., Qian, M.G. and Jin, H.W. (2004), "Study and application of bed separation distribution and development in the process of strata movement", Chin. J. Geotech. Eng., 26(5), 632-636. https://doi.org/10.3321/j.issn:1000-4548.2004.05.012
  32. Xu, J.L., Qian, M.G. and Zhu, W.B. (2005), "Study on influences of primary key stratum on the surface dynamic subsidence", Chin. J Rock Mech. Eng., 24(05), 787-791.
  33. Xu, N.X., Zhang, J.Y., Tian, H., Mei, G. and Ge, Q. (2016), "Discrete element modeling of strata and surface movement induced by mining under open-pit final slope", Int. J. Rock Mech. Min. Sci., 88, 61-76. https://doi.org/10.1016/j.ijrmms.2016.07.006.
  34. Xu, T., Yang, T.H., Chen, C.F., Liu, H.L. and Yu, Q.L. (2015), "Mining induced strata movement and roof behavior in underground coal mine", Geomech. Geophys. Geo-Energy Geo-Resour., 1(3-4), 79-89. https://doi.org/10.1007/s40948-015-0010-2.
  35. Xue, Y.C., Sun, W.B. and Wu, Q.S. (2020), "The influence of magmatic rock thickness on fracture and instability law of mining surrounding rock", Geomech. Eng., 20(6), 547-556. https://doi.org/10.12989/gae.2020.20.6.547.
  36. Yang, W.F. and Xia, X.H. (2013), "Prediction of mining subsidence under thin bedrocks and thick unconsolidated layers based on field measurement and artificial neural networks", Comput. Geosci., 52, 199-203. https://doi.org/10.1016/j.cageo.2012.10.017.
  37. Yang, X., Wen, G., Dai, L., Sun, H. and Li, X. (2019), "Ground subsidence and surface cracks evolution from shallow-buried close-distance multi-seam mining: A case study in Bulianta Coal Mine", Rock Mech. Rock Eng., 52(8), 2835-2852. https://doi.org/10.1007/s00603-018-1726-4.
  38. Yasitli, N.E. and Unver, B. (2005), "3D numerical modeling of longwall mining with top-coal caving", Int. J. Rock Mech. Min. Sci., 42(2), 219-235. https://doi.org/10.1016/j.ijrmms.2004.08.007.
  39. Zhang, P.P., Jiang, L.S., Liu, X.F., Zhang, Z.L. and Liu, X. (2017), "Mining-induced overlying strata structure evolution characteristics and disaster-triggering under high level hard thick strata", J Min. Saf. Eng., 34(5), 852-860.
  40. Zhang, R.B. (2014), "Fracturing migration rules of double thickhard igneous in Yangliu Coal Mine", Master Dissertation, China University of Mining and Technology, Xuzhou, China.
  41. Zhang, Z.G., Huang, M.S., Zhang, C.P., Jiang, K.M. and Bai, Q.M. (2020), "Analytical prediction of tunneling-induced ground movements and liner deformation in saturated soils considering influences of shield air pressure", Appl. Math. Model., 78, 749-772. https://doi.org/10.1016/j.apm.2019.10.025.
  42. Zhao, J.H., Jiang, N., Yin, L.M. and Bai, L.Y. (2019), "The effects of mining subsidence and drainage improvements on a waterlogged area", B. Eng. Geol. Environ., 78(5), 3815-3831. https://doi.org/10.1007/s10064-018-1356-9.
  43. Zhao, J.H., Zhang, X.G., Jiang, N., Yin, L.M. and Guo, W.J. (2020), "Porosity zoning characteristics of fault floor under fluid-solid coupling", B. Eng. Geol. Environ., 1-13. https://doi.org/10.1007/s10064-019-01701-0.
  44. Zhou, F., Sun, W.B., Shao, J.L., Kong, L.J. and Geng, X.Y. (2020a), "Experimental study on nano silica modified cement base grouting reinforcement materials", Geomech. Eng., 20(1), 67-73. https://doi.org/10.12989/gae.2020.20.1.067.
  45. Zhou, G.L., Xu, T., Heap, M.J., Meredith, P.G., Mitchell, T.M., Sesnic, A.S.Y. and Yuan, Y. (2020b), "A three-dimensional numerical meso-approach to modeling time-independent deformation and fracturing of brittle rocks", Comput. Geotech., 117, 103274. https://doi.org/10.1016/j.compgeo.2019.103274.
  46. Zhu, C., Yuan, Y., Chen, Z., Liu, Z. and Yuan, C. (2019), "Study of the stability control of the rock surrounding double-key strata recovery roadways in shallow seams", Adv. Civil Eng. https://doi.org/10.1155/2019/9801637.

피인용 문헌

  1. Dynamic disaster control of backfill mining under thick magmatic rock in one side goaf: A case study vol.27, pp.10, 2020, https://doi.org/10.1007/s11771-020-4532-6
  2. Sensitivity Analysis and Numerical Simulation Study on Main Controlling Factors of Surface Movement and Deformation in Strip Filling Mining under Thick Unconsolidated Layers vol.2021, 2020, https://doi.org/10.1155/2021/6615937