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The research on mechanism and prevention strategy of coal and gas outburst in normal faults based on support body model

Author

Listed:
  • Gang Yang

    (University of Science and Technology Beijing
    University of Science and Technology, Beijing)

  • Dazhao Song

    (University of Science and Technology Beijing
    University of Science and Technology, Beijing)

  • Xueqiu He

    (University of Science and Technology Beijing
    University of Science and Technology, Beijing)

  • Jianguo Zhang

    (State Key Laboratory of Coking Coal Exploitation and Comprehensive Utilization)

  • Liming Qiu

    (University of Science and Technology Beijing
    University of Science and Technology, Beijing
    State Key Laboratory of Coking Coal Exploitation and Comprehensive Utilization)

  • Minggong Guo

    (Pingdingshan Tianan Coal industry Co., Ltds)

  • Yingjie Zhao

    (University of Science and Technology Beijing
    University of Science and Technology, Beijing)

Abstract

The depth of coal mining in China is increasing year by year, and the coal and gas outburst is becoming more and more serious. Most of the coal and gas outburst sites occur in normal faults. In this paper, the evolution law of stress and displacement field of workface under different tectonic zone width of the normal fault was studied, and the support body model of normal fault was constructed, the occurrence mechanism of normal fault coal and gas outburst was revealed, and the prevention and normal fault control strategy was put forwarded. The results show that the greater the width of the fault tectonic zone, the higher the horizontal stress of the driving face, the greater the deformation degree, and the higher the risk of coal and gas outburst. The criterion of coal and gas outburst induced by disturbance of normal fault was proposed, and the evolution process of coal and gas outburst from start to end of normal fault is revealed. Using the microseismic and electromagnetic radiation to monitor the normal fault area, it is found that the fracture frequency and stress of coal rock in the normal fault area are significantly higher than those in the non-fault area. The prevention and control of coal and gas outburst in normal fault should be started from two aspects: eliminating the energy and improving the supporting ability of tectonic zone. The research results provide a new strategy for the prevention and control of coal and gas outburst in fault zones.

Suggested Citation

  • Gang Yang & Dazhao Song & Xueqiu He & Jianguo Zhang & Liming Qiu & Minggong Guo & Yingjie Zhao, 2025. "The research on mechanism and prevention strategy of coal and gas outburst in normal faults based on support body model," 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. 121(12), pages 14067-14089, July.
    • Handle: RePEc:spr:nathaz:v:121:y:2025:i:12:d:10.1007_s11069-025-07340-x
    DOI: 10.1007/s11069-025-07340-x
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    References listed on IDEAS

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    1. Yang, Gang & Song, Dazhao & Wang, Man & Qiu, Liming & He, Xueqiu & Khan, Majid & Qian, Sun, 2024. "New insights into dynamic disaster monitoring through asynchronous deformation induced coal-gas outburst mechanism of tectonic and raw coal seams," Energy, Elsevier, vol. 295(C).
    2. Cheng Zhai & Xianwei Xiang & Jizhao Xu & Shiliang Wu, 2016. "The characteristics and main influencing factors affecting coal and gas outbursts in Chinese Pingdingshan mining region," 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. 82(1), pages 507-530, May.
    3. Zhou, Aitao & Du, Chang'ang & Tian, Jie & Xu, Zhiyuan & Wang, Dongxu & Wang, Kai, 2023. "Experimental study on coal deformation induced by gas adsorption-instantaneous pressure relief under unconstrained stress state with different pore structures," Energy, Elsevier, vol. 276(C).
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