The deformation and failure of large faults caused by coal seam mining are easy to form channels connected with aquifers, which is an important threat to the safe mining of coal seams. This study takes Beigongcun No.1 fault in No.7 mining area of Dongtan Coal Mine as a case, aiming to explore the deformation and permeability resistance of large faults. Through the establishment of engineering geological model, the FLAC3D software is used to simulate the fluid-solid coupling of the mining process. The results show that as the working face advances, the compressive stress within 40 m from the fault decreases significantly, and it is most affected by mining at 20 m below the coal seam after mining to the fault. The calculated fault permeability strength is lower than the Ordovician limestone water pressure. Further simulation of fault mining with different dip angles shows that the failure modes are basically the same, but the failure depth is different. In the dip angle of 50° to 80°, the fault failure depth of 65° is the smallest, and the fault resistance strength of 60° is the largest. This shows that the depth of fault failure is the largest under a special dip angle.
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Research Article|
January 15, 2025
Early Publication
Study on deformation failure and permeability resistance of large faults under mining
Hao Deng;
Hao Deng
1
Institute of Mine Water Hazards Prevention and Controlling Technology, School of Resources and Geosciences, China University of Mining and Technology
, Xuzhou City, Jiangsu Province
221116, China
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Shuyun Zhu;
Shuyun Zhu
*
1
Institute of Mine Water Hazards Prevention and Controlling Technology, School of Resources and Geosciences, China University of Mining and Technology
, Xuzhou City, Jiangsu Province
221116, China
*
Correspondence: [email protected]
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Yingzhou Chen
Yingzhou Chen
1
Institute of Mine Water Hazards Prevention and Controlling Technology, School of Resources and Geosciences, China University of Mining and Technology
, Xuzhou City, Jiangsu Province
221116, China
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1
Institute of Mine Water Hazards Prevention and Controlling Technology, School of Resources and Geosciences, China University of Mining and Technology
, Xuzhou City, Jiangsu Province
221116, China
Shuyun Zhu
*
1
Institute of Mine Water Hazards Prevention and Controlling Technology, School of Resources and Geosciences, China University of Mining and Technology
, Xuzhou City, Jiangsu Province
221116, China
Yingzhou Chen
1
Institute of Mine Water Hazards Prevention and Controlling Technology, School of Resources and Geosciences, China University of Mining and Technology
, Xuzhou City, Jiangsu Province
221116, China
*
Correspondence: [email protected]
Publisher: Geological Society of London
Received:
19 Nov 2023
Revision Received:
09 Sep 2024
Accepted:
21 Nov 2024
First Online:
16 Jan 2025
Online ISSN: 2041-4803
Print ISSN: 1470-9236
Funding
- Funder(s):National Natural Science Foundation of China
- Award Id(s): 52274243
- Award Id(s):
© 2025 The Author(s). Published by The Geological Society of London. All rights, including for text and data mining (TDM), artificial intelligence (AI) training, and similar technologies, are reserved. For permissions: https://www.lyellcollection.org/publishing-hub/permissions-policy. Publishing disclaimer: https://www.lyellcollection.org/publishing-hub/publishing-ethics
© 2025 The Author(s)
Quarterly Journal of Engineering Geology and Hydrogeology (2025) qjegh2023-143.
Article history
Received:
19 Nov 2023
Revision Received:
09 Sep 2024
Accepted:
21 Nov 2024
First Online:
16 Jan 2025
Citation
Hao Deng, Shuyun Zhu, Yingzhou Chen; Study on deformation failure and permeability resistance of large faults under mining. Quarterly Journal of Engineering Geology and Hydrogeology 2025; doi: https://doi.org/10.1144/qjegh2023-143
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