Geomechanics and Engineering

  • 제19권3호
  • /
  • Pages.255-268
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  • 2019
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  • 2005-307X(pISSN)
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  • 2092-6219(eISSN)
테크노프레스 (Techno-Press)
권호 표지
DOI QR코드

DOI QR Code

Support working resistance determined on top-coal caving face based on coal-rock combined body

  • Cheng, Zhanbo (School of Energy and Mining Engineering, China University of Mining and Technology-Beijing) ;
  • Yang, Shengli (School of Energy and Mining Engineering, China University of Mining and Technology-Beijing) ;
  • Li, Lianghui (School of Energy and Mining Engineering, China University of Mining and Technology-Beijing) ;
  • Zhang, Lingfei (School of Energy and Mining Engineering, China University of Mining and Technology-Beijing)
  • 투고 : 2019.06.29
  • 심사 : 2019.10.22
  • 발행 : 2019.10.30
⟨ 이전 논문 다음 논문 ⟩

초록

Taking top-coal caving mining face (TCCMF) as research object, this paper considers the combination of top-coal and immediate roof as cushion layer to build the solution model of support resistance based on the theory of elastic foundation beam. Meanwhile, the physical and mechanical properties of coal-rock combination influencing on strata behaviors is explored. The results illustrate that the subsidence of main roof in coal wall increases and the first weighting interval decreases with the increase of top-coal and immediate roof thicknesses as well as the decrease of top-coal and immediate roof elastic modulus. Moreover, the overlying strata reflecting on support has negative and positive relationship with top-coal thickness and immediate roof thickness, respectively. However, elastic modulus has limit influence on the dead weight of top-coal and immediate roof. As a result, it has similar roles on the increase of total support resistance and overlying strata reflecting on support in the limit range of roof control distance. In view of sensitive analysis causing the change of total support resistance, it can be regards as the rank of three components as immediate roof weight > overlying strata reflecting on support > top coal weight. Finally, combined with the monitoring data of support resistance in Qingdong 828, the validity of support resistance determined based on elastic foundation beam is demonstrated, and this method can be recommended to adopt for support type selecting in TCCMF.

키워드

과제정보

연구 과제 주관 기관 : National Natural Science Foundation of China

참고문헌

  1. Alehossein, H. and Korinets, A. (2000), "Mesh-independent finite difference analysis using gradient-dependent plasticity", Commun. Numer. Meth. Eng., 16(5), 363-375. https://doi.org/10.1002/(SICI)1099-0887(200005)16:5%3C363::AID-CNM344%3E3.0.CO;2-W.
  2. Alehossein, H. and Poulsen, B.A. (2010), "Stress analysis of longwall top coal caving", Int. J. Rock Mech. Min. Sci., 47(1), 30-41. https://doi.org/10.1016/j.ijrmms.2009.07.004.
  3. Alejano, L.R., Ramirez-Oyanguren, P. and Taboada, J. (1999), "FDM predictive methodology for subsidence due to flat and inclined coal seam mining", Int. J. Rock Mech. Min. Sci., 36(4), 475-491. https://doi.org/10.1016/S0148-9062(99)00022-4.
  4. Basarir, H., Oge, I.F. and Aydin, O. (2015), "Prediction of the stresses around main and tail gates during top coal caving by 3D numerical analysis", Int. J. Rock Mech. Min. Sci., 76, 88-97. https://doi.org/10.1016/j.ijrmms.2015.03.001.
  5. BP (2018), "BP Statistical review of world energy", British Petroleum, London, U.K.
  6. Cheng, Z.B., Li, L.H. and Zhang, Y.N. (2019), "Laboratory investigation of the mechanical properties of coal-rock combined body", Bull. Eng. Geol. Environ. https://doi.org/10.1007/s10064-019-01613-z.
  7. Cheng, Z.B., Zhang, Y.N., Li, L.H. and Lv, H.Y. (2018), "Theoretical solution and analysis of the elastic modulus and foundation coefficient of coal-rock combination material", Int. J. Mater. Sci. Res., 1(1), 23-31. https://doi.org/10.18689/ijmsr-1000104
  8. Guo, J., Feng, G., Wang, P., Qi, T., Zhang, X. and Yan, Y. (2018), "Roof strata behaviour and support resistance determination for ultra-thick longwall top coal caving panel: A case study of the Tashan coal mine", Energies, 11(5), 1041. https://doi.org/10.3390/en11051041.
  9. Hock, E. and Brown, E.T. (1997), "Practical estimates of rock mass strength", Int. J. Rock Mech. Min. Sci., 34(8), 1165-1186. https://doi.org/10.1016/S1365-1609(97)80069-X.
  10. 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.
  11. Kirzhner, F. and Rozenbaum, M. (2001), "Behavior of the working fluid in mechanized support in permafrost", J. Cold Reg. Eng., 15(3), 170-185. https://doi.org/10.1061/(ASCE)0887-381X(2001)15:3(170).
  12. Kong, D., Cheng, Z. and Zheng, S. (2019), "Study on failure mechanism and stability control measures in large-cuttingheight coal mining face with deep-buried seam", Bull. Eng. Geol. Environ., 1-15. https://doi.org/10.1007/s10064-019-01523-0.
  13. Lei, C., Yang, J.H., Song, G.F. and Zhang, K. (2016), "Calculation of weighting interval and real-time working resistance based on beam elastic foundation method", Electron. J. Geotech. Eng., 21(5), 1931-1942.
  14. Liu, F., Guo, Z., Lv, H. and Cheng, Z. (2018), "Test and analysis of blast wave in mortar test block", Int. J. Rock Mech. Min. Sci., 108, 80-85. https://doi.org/10.1016/j.ijrmms.2018.06.003.
  15. Liu, X.J. and Cheng, Z.B. (2019), "Changes in subsidence-field surface movement in shallow-seam coal mining", J. S. Afr. Inst. Min. Metall., 119, 201-206. https://doi.org/10.17159/2411-9717/2019/v119n2a12.
  16. Lv, H., Tang, Y., Zhang, L., Cheng, Z. and Zhang, Y. (2019), "Analysis for mechanical characteristics and failure models of coal specimens with non-penetrating single crack", Geomech. Eng., 17(4), 355-365. https://doi.org/10.12989/gae.2019.17.4.355.
  17. Marschalko, M., Bednarik, M., Yilmaz, I., Bouchal, T. and Kubecka, K. (2011), "Evaluation of subsidence due to underground coal mining: an example from the Czech Republic", Bull. Eng. Geol. Environ., 71, 105-111. https://doi.org/10.1007/s10064-011-0401-8.
  18. Masri, M., Sibai, M., Shao, J.F. and Mainguy M. (2014), "Experimental investigation of the effect of temperature on the mechanical behavior of Tournemire shale", Int. J. Rock Mech. Min. Sci., 70(9), 185-191. https://doi.org/10.1016/j.ijrmms.2014.05.007.
  19. Sasaoka, T., Takamoto, H., Shimada, H., Oya, J., Hamanaka, A. and Matsui, K. (2015), "Surface subsidence due to underground mining operation under weak geological condition in Indonesia", J. Rock Mech. Geotech. Eng., 7(3), 337-344. https://doi.org/10.1016/j.jrmge.2015.01.007.
  20. Suchowerska, A.M., Carter, J.P. and Hambleton, J.P. (2015), "Geomechanics of subsidence above single and multi-seam coal mining", J. Rock Mech. Geotech. Eng., 8(3), 304-313. https://doi.org/10.1016/j.jrmge.2015.11.007.
  21. Vakili, A., and Hebblewhite, B.K. (2010), "A new cavability assessment criterion for longwall top coal caving", Int. J. Rock Mech. Min. Sci., 47(8), 1317-1329. https://doi.org/10.1016/j.ijrmms.2010.08.010.
  22. Wang, J., Yang, S., Li, Y. and Wang, Z. (2015), "A dynamic method to determine the supports capacity in longwall coal mining", Int. J. Min. Reclam. Environ., 29(4), 277-288. https://doi.org/10.1080/17480930.2014.891694.
  23. Wang, J., Yang, S., Li, Y., Wei, L., and Liu, H. (2014), "Caving mechanisms of loose top-coal in longwall top-coal caving mining method", Int. J. Rock Mech. Min. Sci., 71, 160-170. https://doi.org/10.1016/j.ijrmms.2014.04.024.
  24. Xie, G.X., Chang, J.C. and Yang, K. (2009), "Investigations into stress shell characteristics of surrounding rock in fully mechanized top-coal caving face", Int. J. Rock Mech. Min. Sci., 46(1), 172-181. https://doi.org/10.1016/j.ijrmms.2008.09.006.
  25. Xie, Y.S. and Zhao, Y.S. (2009), "Numerical simulation of the top coal caving process using the discrete element method", Int. J. Rock Mech. Min. Sci., 46(6), 983-991. https://doi.org/10.1016/j.ijrmms.2009.03.005.
  26. Yang, T., Liu, J., Finklea, H., Lee, S., Epting, W.K., Mahbub, R., Hsu, T., Salvador, P.A., Abernathy, H.W. and Hackett, G.A. (2018), "An efficient approach for prediction of Warburg-type resistance under working currents", Int. J. Hydrogen Energy, 43(32), 15445-15456. https://doi.org/10.1016/j.ijhydene.2018.06.076.
  27. 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.
  28. Zhang, Y., Cheng, Z. and Lv, H. (2019). "Study on failure and subsidence law of frozen soil layer in coal mine influenced by physical conditions", Geomech. Eng., 18(1), 97-109. https://doi.org/10.12989/gae.2019.18.1.97.

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