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Numerical Analyses on the Stability of a Deep Coalmine Roadway Passing through a Fault Zone: A Case Study of the Gugui Coalfield in China

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  • Yongshui Kang

    (State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, China
    School of Engineering Sciences, University of Chinese Academy of Sciences, Beijing 100049, China)

  • Congcong Hou

    (State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, China
    School of Engineering Sciences, University of Chinese Academy of Sciences, Beijing 100049, China)

  • Jingyi Liu

    (State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, China
    School of Engineering Sciences, University of Chinese Academy of Sciences, Beijing 100049, China)

  • Zhi Geng

    (State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, China
    School of Engineering Sciences, University of Chinese Academy of Sciences, Beijing 100049, China)

  • Jianben Chen

    (Guqiao Coalmine, Huainan Mining Industry (Group) Limited Liability Company, Huainan 232131, China)

  • Bin Liu

    (State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, China)

Abstract

Massive deformation often occurs when deep coalmine roadways pass through a fault zone due to the poor integrity of rock mass and high tectonic stress. To study deformation characteristics of the surrounding rock in the fault zone of a coalmine, a roadway passing through the FD1041 fault zone in China’s Gugui coalfield was investigated in this research. The geo-stress characteristics of this fault zone were analyzed based on the Mohr failure theory. Furthermore, a three-dimensional model for the experimental roadway in the FD1041 fault zone was built and calculated by a numerical program based on the distinct element method. Stability conditions of the roadway, using several types of support methods, were calculated and compared. Calculation results indicated that pre-grouting provides favorable conditions for the stability of a roadway in a fault zone. Finally, an optimized support strategy was proposed and implemented in the experimental roadway. Monitored results demonstrated that the optimized support strategy is appropriate for this fault zone.

Suggested Citation

  • Yongshui Kang & Congcong Hou & Jingyi Liu & Zhi Geng & Jianben Chen & Bin Liu, 2021. "Numerical Analyses on the Stability of a Deep Coalmine Roadway Passing through a Fault Zone: A Case Study of the Gugui Coalfield in China," Energies, MDPI, vol. 14(8), pages 1-15, April.
    • Handle: RePEc:gam:jeners:v:14:y:2021:i:8:p:2114-:d:533512
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    References listed on IDEAS

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    1. Qingxian Huang & Xufeng Wang & Xuyang Chen & Dongdong Qin & Zechao Chang, 2020. "Evolution of Interior and Exterior Bearing Structures of the Deep-Soft-Rock Roadway: From Theory to Field Test in the Pingdingshan Mining Area," Energies, MDPI, vol. 13(17), pages 1-19, August.
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