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Comprehensive analysis control effect of faults on the height of fractured water-conducting zone in longwall mining

Author

Listed:
  • Xianhui Wang

    (China University of Mining and Technology
    China University of Mining and Technology)

  • Shuyun Zhu

    (China University of Mining and Technology
    China University of Mining and Technology)

  • Haitao Yu

    (China University of Mining and Technology
    China University of Mining and Technology)

  • Yanxin Liu

    (Baodian Coal Mine, Yanzhou Coal Mining Company)

Abstract

In order to examine the height of a fractured water-conducting zone due to the presence of a fault, a typical working face in the Baodian Coal Mine which is located in the Yanzhou Coalfield of northeastern China is examined as a case study. Two subsurface conditions with and without a fault are considered. In this study, equations are developed to calculate the maximum span of the unsupported roof with and without the presence of a fault. Numerical models are used to examine the changes in stresses and the development of a plastic zone at different stages of mining. A comparison of the results based on theoretical analysis and numerical model shows that the height of the fractured water-conducting zone increases significantly with the presence of a fault. The height of the fractured water-conducting zone is about 1.50 times higher than the case without a fault. The results provide important insight into the prevention and control of water inrush in mines with thick and loose deposits and a thin bedrock.

Suggested Citation

  • Xianhui Wang & Shuyun Zhu & Haitao Yu & Yanxin Liu, 2021. "Comprehensive analysis control effect of faults on the height of fractured water-conducting zone in longwall mining," Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, Springer;International Society for the Prevention and Mitigation of Natural Hazards, vol. 108(2), pages 2143-2165, September.
    • Handle: RePEc:spr:nathaz:v:108:y:2021:i:2:d:10.1007_s11069-021-04772-z
    DOI: 10.1007/s11069-021-04772-z
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    References listed on IDEAS

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    1. Yun Wu & Xiao-Zhao Li & Zhen Huang & Sen Xue, 2021. "Effect of temperature on physical, mechanical and acoustic emission properties of Beishan granite, Gansu Province, China," Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, Springer;International Society for the Prevention and Mitigation of Natural Hazards, vol. 107(2), pages 1577-1592, June.
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