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Geotechnical and Geological Engineering

, Volume 37, Issue 5, pp 4285–4299 | Cite as

Numerical Simulation and Analysis of Surface and Surrounding Rock Failure in Deep High-Dip Coal Seam Mining

  • Qian ChengEmail author
  • Yongkui Shi
  • Lingqun Zuo
Original Paper
  • 148 Downloads

Abstract

With the continuous reduction of coal resources, mining conditions become more and more complex, showing a trend of deep and large dip. There are two main problems in the mining of high dip seam: on the one hand, the roof caving characteristics of high dip seam mining are more complex, and the solution of this problem is helpful to formulate a reasonable and effective support scheme for the roof in the production process of coal mine; on the other hand, the characteristics of surface subsidence caused by mining of high dip seam, which is related to the prediction and prediction of surface subsidence. Prevention and cure. Based on this, firstly, according to the knowledge of elasticity mechanics, the mining dynamic model of high dip coal seam is established; secondly, the geological model of high dip coal seam is established by using the simulation numerical software FLAC3D, and the excavation process is simulated; finally, the excavation of the working face with 40 m and 14 m coal pillars is simulated by FLAC3D. The results show that the mining of high dip coal seam will cause a large amount of surface subsidence, which will seriously affect the surrounding rock by stress concentration. After setting 40 m and 14 m coal pillars, the serious problems of surface subsidence and surrounding rock destruction caused by mining can be effectively reduced.

Keywords

Large inclination angle Surface subsidence FLAC3D Numerical simulation Coal pillar size 

Notes

References

  1. Alejano LR, Ramirez-Oyanguren P, Taboada J (1999) FDM predictive methodology of subsidence due to flat and inclined coal seam mining. Int J Rock Mech Min Sci 36(4):475–491CrossRefGoogle Scholar
  2. Chen L, Li S, Zhang K et al (2017) Secondary development and application of the NP-T creep model based on FLAC 3D. Arab J Geosci 10(23):508CrossRefGoogle Scholar
  3. Cheng W, Lulu S, Gang W et al (2016) Similar material simulation test of steep-inclined extra-thick coal seam. J Min Saf Eng 33(3):387–392Google Scholar
  4. Das AJ, Mandal PK, Bhattacharjee R et al (2017) Evaluation of stability of underground workings for exploitation of an inclined coal seam by the ubiquitous joint model. Int J Rock Mech Min Sci 93:101–114CrossRefGoogle Scholar
  5. Han G, Qi Q, Cui T et al (2016) Mining plan simulation and rock migration analysis in steep seam mining. J Min Saf Eng 33(4):618–623Google Scholar
  6. Li X, Zhaohui W, Jinwang Z (2017) Stability of roof structure and its control in steeply inclined coal seams. Int J Min Sci Technol 27(2):359–364CrossRefGoogle Scholar
  7. Liu W, Pang L, Liu Y, Du Y (2018) Characteristics analysis of roof overburden fracture in thick coal seam in deep mining and engineering application of super high water material in backfill mining. Geotech Geol Eng.  https://doi.org/10.1007/s10706-018-00770-4 CrossRefGoogle Scholar
  8. Mohammad J, Kumar SR (2018) Design of rhombus coal pillars and support for Roadway Stability and mechanizing loading of face coal using SDLs in a steeply inclined thin coal seam—a technical feasibility study. Arab J Geosci 11(15):415CrossRefGoogle Scholar
  9. Ren FH, Lai XP, Cai MF (2008) Dynamic destabilization analysis based on AE experiment of deep-seated, steep-inclined and extra-thick coal seam. J Univ Sci Technol Beijing Mineral Metal Mater 15(3):215–219Google Scholar
  10. Shan PF, Lai XP (2018) numerical simulation of the fluid-solid coupling process during the failure of a fractured coal-rock mass based on the regional geostress. Transp Porous Media 124(3):1061–1079CrossRefGoogle Scholar
  11. Song ZF, Lei JH, Wang XT et al (2012) Study on roadway parameters of broken compound roof of gently inclined thick coal seam. Energy Proc 16(Part-PA):334–340CrossRefGoogle Scholar
  12. Sun J, Miao X (2017) Water-isolating capacity of an inclined coal seam floor based on the theory of water-resistant key strata. Min Water Environ 36(2):310–322CrossRefGoogle Scholar
  13. Wang NB, Zhang N, Feng- CUI et al (2013a) Characteristics of stope migration and roadway surrounding rock fracture for fully mechanized top coal caving face in steeply dipping and extra thick coal seam. J China Coal Soc 38(8):1312–1318Google Scholar
  14. Wang H, Jiang Y, Zhao Y et al (2013b) Numerical investigation of the dynamic mechanical state of a coal pillar during longwall mining panel extraction. Rock Mech Rock Eng 46(5):1211–1221CrossRefGoogle Scholar
  15. Wang J, Zhang J, Li Z (2016) A new research system for caving mechanism analysis and its application to sublevel top-coal caving mining. Int J Rock Mech Min Sci 88(2):273–285CrossRefGoogle Scholar
  16. Wang B, Xu J, Xuan D (2018) Time function model of dynamic surface subsidence assessment of grout-injected overburden of a coal mine. Int J Rock Mech Min Sci 104:1–8CrossRefGoogle Scholar
  17. Xin Y, Gou P, Ge F (2014) Analysis of stability of support and surrounding rock in mining top coal of inclined coal seam. Int J Min Sci Technol 24(1):63–68CrossRefGoogle Scholar
  18. Xu C, Yuan L, Cheng Y et al (2016) Square-form structure failure model of mining-affected hard rock strata: theoretical derivation, application and verification. Environ Earth Sci 75(16):1180CrossRefGoogle Scholar
  19. Yin Y, Jianchao Z, Yubao Z et al (2018) Experimental study of the movement of backfilling gangues for goaf in steeply inclined coal seams. Arab J Geosci 11(12):318CrossRefGoogle Scholar
  20. Zhang J, Sun Q, Zhou N et al (2016a) Research and application of roadway backfill coal mining technology in western coal mining area. Arab J Geosci 9(10):558CrossRefGoogle Scholar
  21. Zhang G, Zhang W, Wang C et al (2016b) Mining thick coal seams under thin bedrock-deformation and failure of overlying strata and alluvium. Geotech Geol Eng 34(5):1553–1563CrossRefGoogle Scholar
  22. Zhang DM, Zheng BB, Yin GZ et al (2017) Mechanics and permeability characteristics of steep seam roof sandstone under disturbance stress. Meitan Xuebao/J China Coal Soc 42:128–137Google Scholar
  23. Zhu W, Xu J, Xu J et al (2017) Pier-column backfill mining technology for controlling surface subsidence. Int J Rock Mech Min Sci 96:58–65CrossRefGoogle Scholar

Copyright information

© Springer Nature Switzerland AG 2019

Authors and Affiliations

  1. 1.School of Mining and Safety EngineeringShandong University of Science and TechnologyQingdaoChina
  2. 2.College of EngineeringShandong University of Science and TechnologyQingdaoChina

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