Geomechanics and Engineering

  • 제14권5호
  • /
  • Pages.439-451
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  • 2018
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  • 2005-307X(pISSN)
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  • 2092-6219(eISSN)
테크노프레스 (Techno-Press)
권호 표지
DOI QR코드

DOI QR Code

Study of stability and evolution indexes of gobs under unloading effect in the deep mines

  • Fu, Jianxin (School of Civil and Resource Engineering, University of Science and Technology Beijing) ;
  • Song, Wei-Dong (School of Civil and Resource Engineering, University of Science and Technology Beijing) ;
  • Tan, Yu-Ye (School of Civil and Resource Engineering, University of Science and Technology Beijing)
  • 투고 : 2016.07.29
  • 심사 : 2017.08.19
  • 발행 : 2018.04.10
⟨ 이전 논문 다음 논문 ⟩

초록

The stress path characteristics of surrounding rock in the formation of gob were analysed and the unloading was solved. Taking Chengchao Iron Mine as the engineering background, the model for analysing the instability of deep gob was established based on the mechanism of stress relief in deep mining. The energy evolution law was investigated by introducing the local energy release rate index (LERR), and the energy criterion of instability of surrounding rock was established based on the cusp catastrophe theory. The results showed that the evolution equation of the local energy release energy of the surrounding rock was quartic function with one unknown and the release rate increased gradually during the mining. The calculation results showed that the gob was stable. The LERR per unit volume of the bottom structure was relatively smaller, which mean the stability was better. The LERR distribution showed that there was main energy release in the horizontal direction and energy concentration in the vertical direction which meet the characteristics of deep mining. In summary, this model could effectively calculate the stability of surrounding rock in the formation of gob. The LERR could reflect the dynamic process of energy release, transfer and dissipation which provided an important reference for the study of the stability of deep mined out area.

키워드

과제정보

연구 과제 주관 기관 : National Natural Science Foundation of China, China Postdoctoral Science Foundation, Central Universities

참고문헌

  1. An, B., Zhang, J. and Li, M. (2016), "Stability of pillars in backfilling mining working face to recover room mining standing pillars", J. Min. Safe. Eng., 33, 238-245.
  2. Anon. (1986), "Coal mining technology: Some british developments", Coal Min., 23(3), 38-40.
  3. Cao, S.G., Zhou, X. and Xie, B. (2009), Mine Safety Terms, Standards Press of China, Beijing, China.
  4. Chen, L. (2006), "A study of physical model-test technology and application in Geotechnical Engineering", Ph.D. Dissertation, Wuhan Institute of Rock and Soil Mechanics, Wuhan, China.
  5. Chen, Z. Hou, K. and Yang, B. (2010), "3D finite element numerical on gob stability of some mine", Nonferr. Metal, 62(3), 142-145.
  6. Dong, P. (2012), "Study on the impacting effect of roof stopping ore and rock based on discrete element numerical simulation technique", Min. Explor., 5, 28.
  7. Feng, Q. and Jiang, B. (2015), "Analytical solution for stress and deformation of the mining floor based on integral transform", J. Min. Sci. Technol., 25(4), 581-586. https://doi.org/10.1016/j.ijmst.2015.05.010
  8. Gong, F.Q., Li, X.B., Dong, L.J. and Liu, X.L. (2008), "Underground goaf risk evaluation based on uncertainty measurement theory", Chin. J. Rock Mech. Eng., 27(2), 323-330.
  9. Hancock, G.R. (2004), "The use of landscape evolution models in mining rehabilitation design", Environ. Geol., 46(5), 561-573. https://doi.org/10.1007/s00254-004-1030-3
  10. He, G.L., Li, D.C., Zhai, Z.W. and Tang, G.Y. (2007), "Analysis of instability of coal pillar and stiff roof system", J. Chin. Coal Soc., 32(9), 897-901.
  11. Hoek, E. and Brown, E.T. (1980), Underground Excavation in Rock, London Institution of Mining and Metallurgy.
  12. Kripakov, N.P., Sun, M.C. and Donato, D.A. (1995), "ADNIA applied toward simulation of progressive failure in underground mine structure", Comput. Struct., 56(2-3), 329-344. https://doi.org/10.1016/0045-7949(95)00026-D
  13. Lai, X.P., Zhang, L.J. and Cai, M.F. (2003), "Application of neural network to the statistics and prediction of dynamical damage and evolutement in the large scale mine-out area supported by rock based composite materials", J. Univ. Sci. Technol. Beijing, 25(4), 300-303.
  14. Li, D., Zhao, F. and Zheng, M. (2014), "Fractal characteristics of cracks and fragments generated in unloading rock burst tests", J. Min. Sci. Technol., 24(6), 819-823. https://doi.org/10.1016/j.ijmst.2014.10.014
  15. Ma, H., Wang, J. and Wang, Y. (2012), "Study on mechanics and domino effect of large-scale goaf cave-in", Safe. Sci., 50(4), 689-694. https://doi.org/10.1016/j.ssci.2011.08.050
  16. Mamtimin, G.E.N.I. and Rahmatjian, I. (2014), "Modern numerical simulation methods and its practical applications in engineering", Eng. Mech., 33, 11-18.
  17. Mote, C.D. (1971), "Global-local finite element", J. Numer. Meth. Eng., 3(4), 565-574. https://doi.org/10.1002/nme.1620030410
  18. Okada, H., Endoh, S. and Kikuchi, M. (2005), "On fracture analysis using an element overlay technique", Eng. Fract. Mech., 72(5), 773-789. https://doi.org/10.1016/j.engfracmech.2004.05.003
  19. Ouria, A., Toufigh, V., Desai, C., Toufigh, V. and Saadatmanesh, H. (2016), "Finite element analysis of a CFRP reinforced retaining wall", Geomech. Eng., 10(6), 757-774. https://doi.org/10.12989/gae.2016.10.6.757
  20. Please, C.P., Mason, D.P., Khalique, C.M., Ngnotchouye, J.M.T., Hutchinson, A.J., van der Merwe, J.N. and Yilmaz, H. (2013), "Fracturing of a Euler-Bernoulli beam in coal mine pillar extraction", J. Rock Mech. Min. Sci., 64, 132-138.
  21. Sakamoto, A., Yamada, N., Iwaki, K. and Kawamoto, T. (2005), "Applicability of recycling materials to cavity filling materials", J. Soc. Mater. Sci., 54(11), 1123-1128. https://doi.org/10.2472/jsms.54.1123
  22. Shang, Z., Tang, S. and Jiao, W. (2014), "Failure probability of goaf in large-scale based on simulation of $FLAC^{3D}$", Rock Soil Mech., 35, 3000-3006.
  23. Shreedharan, S. and Kulatilake, P.H. (2016), "Discontinuum-equivalent continuum analysis of the stability of tunnels in a deep coal mine using the distinct element method", Rock Mech. Rock Eng., 49(5), 1903-1922. https://doi.org/10.1007/s00603-015-0885-9
  24. Song, W.D., Fu, J.X., Du, J.H. and Zhang, C.L. (2012), "Analysis of stability of goaf group in metal mines based on precision detection", Rock Soil Mech., 33(12), 3781-3787.
  25. Tang, L., Zhou, J. and Zhang, J. (2012), "Mechanical response of deep stope-out areas and filling effect under dynamic disturbance", J. Chengdu Univ. Technol., 39(6), 623-628.
  26. Tao, M., Chen, Z., Li, X., Zhao, H. and Yin, T. (2016), "Theoretical and numerical analysis of the influence of initial stress gradient on wave propagations", Geomech. Eng., 10(3), 285-296. https://doi.org/10.12989/gae.2016.10.3.285
  27. Terada, K. and Kikuchi, N. (2001), "A class of general algorithms for multi-scale analyses of heterogeneous media", Comput. Meth. Appl. Mech. Eng., 190(40-41), 5427-5464. https://doi.org/10.1016/S0045-7825(01)00179-7
  28. Tulu, I.B. and Heasley, K.A. (2011), "Investigating the mechanics of pillar loading through the analysis of in-situ stress measurements", Proceedings of the 45th US Rock Mechanics/Geomechanics Symposium, San Francisco, California, U.S.A., June.
  29. Wang, C., Guo, J. and Wang, L. (2015), "Recognition of goaf risk based on support vector machines method", J. Chongqing Univ., 38, 85-93.
  30. Wang, H., Li, Y., Li, S., Zhang, Q. and Liu, J. (2016), "An elasto-plastic damage constitutive model for jointed rock mass with an application", Geomech. Eng., 11(1), 77-94. https://doi.org/10.12989/gae.2016.11.1.077
  31. Wang, X., Kulatilake, P.H.S.W. and Song, W.D. (2011), "Stability investigations around a mine tunnel through three-dimensional discontinuum and continuum stress analyses", Tunn. Undergr. Sp. Technol., 32, 98-112.
  32. Whittles, D.N., Lowndes, I.S., Kingman, S., Yates, C. and Jobling, S. (2007), "The stability of methane capture boreholes around a long wall coal panel", J. Coal Geol., 71(2-3), 313-328. https://doi.org/10.1016/j.coal.2006.11.004
  33. Wu, Y., Zhang, X. and Li, X. (2010), "Discrete element simulation of collapse of mined-out area", Min. Technol., 2901, 73-80.
  34. Yu, B., Zhang, Z., Kuang, T. and Liu, J. (2016), "Stress changes and deformation monitoring of longwall coal pillars located in weak ground", Rock Mech. Rock Eng., 49(8), 3293-3305. https://doi.org/10.1007/s00603-016-0970-8
  35. Zhang, Y.P., Cao, P., Yuan, H.P. and Dong, L.J. (2010), "Numerical simulation on stability of complicated goaf", J. Min. Safe. Eng., 27(2), 233-238.

피인용 문헌

  1. Failure Prediction of Two Types of Rocks Based on Acoustic Emission Characteristics vol.2019, pp.None, 2019, https://doi.org/10.1155/2019/5028489