LAPSE:2023.36136
Published Article
LAPSE:2023.36136
Surface Subsidence Characteristics of Mining Panel Layout Configuration with Multi-Seam Longwall Mining
Hengzhong Zhu, Huajun Wang, Rong Gao, Yongqiang Zhao
July 4, 2023
Mining-induced subsidence is critical for ecological environment reconstruction and damage prevention in coal mining areas. Understanding the characteristics of surface subsidence with multi-seam mining is the first step. Surface subsidence of different mining panel layout configurations was investigated by means of UDEC numerical simulation. Based on the simulation results, it was indicated that mining panel layout configuration had a significant impact on surface subsidence, including ground surface subsidence, horizontal displacement, crack propagation, and ground surface fissure development. The overlapped region of the upper panel and the lower panel is the key region, where existing bedding separations and strata cracks close and activate, the integrity and strength of the interburden layer are reduced, and the subsidence magnitude is enhanced. The subsidence profile of the overlapped region for the stacked configuration, external staggered, the edge of the lower panel internal staggered, two edges of the lower panel internal staggered are steeper and deeper, and the corresponding values of ground surface subsidence and horizontal displacement are greater than other regions. The ground surface fissures with the types of stepped, slided, and graben developed on the ground surface above the edge of the mining panel, and the development location is closely related to the strata movement edge. Because of the support activities of the reserved coal pillar, the ground subsidence of the external staggered (internal staggered) of the upper panel with the coal pillar is slight. The external staggered (internal staggered) and external staggered (internal staggered) of the upper panel with the coal pillar can be selected as the preferred layout configuration. The proposed description of surface subsidence of different mining panel layout configurations can be applied in subsidence prediction.
Keywords
ground surface fissure development, ground surface movement, mining panel layout configuration, multi-seam surface subsidence, numerical simulation
Suggested Citation
Zhu H, Wang H, Gao R, Zhao Y. Surface Subsidence Characteristics of Mining Panel Layout Configuration with Multi-Seam Longwall Mining. (2023). LAPSE:2023.36136
Author Affiliations
Zhu H: State Key Laboratory of Water Resource Protection and Utilization in Coal Mining, Beijing 102209, China; School of Energy and Mining Engineering, Shandong University of Science and Technology, Qingdao 266590, China; State Key Laboratory of Strata Intellig
Wang H: School of Mining and Mechanical Engineering, Liupanshui Normal University, Liupanshui 553000, China
Gao R: Energy Administration of Zhijin County, Bijie 552100, China
Zhao Y: State Key Laboratory of Water Resource Protection and Utilization in Coal Mining, Beijing 102209, China
Journal Name
Processes
Volume
11
Issue
6
First Page
1590
Year
2023
Publication Date
2023-05-23
Published Version
ISSN
2227-9717
Version Comments
Original Submission
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PII: pr11061590, Publication Type: Journal Article
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LAPSE:2023.36136
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doi:10.3390/pr11061590
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Jul 4, 2023
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CC BY 4.0
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Jul 4, 2023
 
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Jul 4, 2023
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Calvin Tsay
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