Large-Deformation Failure Mechanism and Stability Control of a Swelling Soft Rock Roadway in a Sea Area: A Case Study in Eastern China

Ling Dong, Dong Wang (), Xiaoming Sun, Yujing Jiang, Hengjie Luan, Huichen Xu, Baocheng Li and Feng Cai
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Ling Dong: State Key Laboratory of Mining Disaster Prevention and Control Co-Founded by Shandong Province and the Ministry of Science and Technology, Shandong University of Science and Technology, Qingdao 266590, China
Dong Wang: State Key Laboratory of Mining Disaster Prevention and Control Co-Founded by Shandong Province and the Ministry of Science and Technology, Shandong University of Science and Technology, Qingdao 266590, China
Xiaoming Sun: State Key Laboratory for Geomechanics and Deep Underground Engineering, China University of Mining and Technology, Beijing 100083, China
Yujing Jiang: State Key Laboratory of Mining Disaster Prevention and Control Co-Founded by Shandong Province and the Ministry of Science and Technology, Shandong University of Science and Technology, Qingdao 266590, China
Hengjie Luan: State Key Laboratory of Mining Disaster Prevention and Control Co-Founded by Shandong Province and the Ministry of Science and Technology, Shandong University of Science and Technology, Qingdao 266590, China
Huichen Xu: College of Mechanical and Architectural Engineering, Taishan University, Taian 271000, China
Baocheng Li: State Key Laboratory of Mining Disaster Prevention and Control Co-Founded by Shandong Province and the Ministry of Science and Technology, Shandong University of Science and Technology, Qingdao 266590, China
Feng Cai: China National Coal Group Corporation, Beijing 100120, China

Sustainability, 2023, vol. 15, issue 6, 1-12

Abstract: Coal mining in sea areas has higher requirements for geological support systems, technical equipment levels, and safety production capacities because of the complex engineering geological conditions of underwater coal mines. In this paper, the deformation failure mechanism and stability control of a typical swelling soft rock roadway in the Beizao coal mine in a sea area are studied. A series of mechanical experiments and theoretical analyses were conducted to research the mechanical properties and reasons for the deformation failure of the swelling soft rock roadway. The type of the large-deformation failure mechanism of the soft rock roadway was identified as type III ABC , which could be converted to a simple one, such as type II B . The proposed stability control measure, containing constant-resistance large-deformation bolts, steel mesh, floor hollow grouting cables, and steel fiber concrete, was applied to the site. A good supporting effect was achieved, which could provide a beneficial reference for swelling soft rock roadways in sea areas.

Keywords: swelling soft rock roadway; large-deformation failure mechanism; constant-resistance large-deformation bolt; coal mine in sea area (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2023
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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