文献类型：期刊文献

英文题名：Deformation Mechanism and Control Technology of Surrounding Rock in the Deep-Buried Large-Span Chamber

作者：Yu, Weijian Li, Ke

第一作者：Yu, Weijian

通信作者：Li, K[1];Li, K[2]

机构：[1]Hunan Univ Sci & Technol, Sch Resource & Environm & Safety Engn, Xiangtan 411201, Hunan, Peoples R China;[2]Hunan Univ Sci & Technol, Hunan Prov Key Lab Safe Min Tech Coal Mines, Xiangtan 411201, Hunan, Peoples R China;[3]Guizhou Inst Technol, Coll Min, Guiyang 550003, Guizhou, Peoples R China

第一机构：Hunan Univ Sci & Technol, Sch Resource & Environm & Safety Engn, Xiangtan 411201, Hunan, Peoples R China

通信机构：corresponding author), Hunan Univ Sci & Technol, Sch Resource & Environm & Safety Engn, Xiangtan 411201, Hunan, Peoples R China;corresponding author), Guizhou Inst Technol, Coll Min, Guiyang 550003, Guizhou, Peoples R China.|贵州理工学院;

年份：2020

卷号：2020

外文期刊名：GEOFLUIDS

收录：;Scopus(收录号：2-s2.0-85094832506);WOS:【SCI-EXPANDED(收录号:WOS:000586427200003)】；

基金：This research was supported by the National Natural Science Foundation of China (No. 51974117) and the Hunan Provincial Natural Science Foundation of China (No. 2020JJ4027). Dr. Genshui Wu of China University of Mining and Technology (Beijing) had provided a lot of valuable opinions on the revision. We would like to express our sincere thanks to Dr. Wu.

语种：英文

摘要：The selection of the support scheme for deep-buried and large-span chambers has been a severe problem in underground engineering. To further study the mechanical mechanism of large deformation, based on the repair engineering of the chambers of Pingdingshan No.6 mine in China, the field investigation, laboratory test, numerical simulation, and theoretical analysis were studied. The surrounding rock of the central substation chamber (CSC) and the main pumping chamber (MPC) were classified according to the rock mass rating (RMR) classification method, and the main factors affecting the stability of the surrounding rock of the chambers were revealed. A prediction model of mechanical parameters of the surrounding rock was established based on the Hoek-Brown failure criterion. Additionally, the prediction results were used in FLAC(3D) to further analyze the failure of the original support scheme, and the feasibility of the restoration plan was proposed. Six key points of support technology for this kind of chamber were put forward. Comprehensive support and repair scheme, including "bolt, metal mesh, shotcrete, grouting, anchor cable, and combined anchor cable," was put forward. The engineering practice indicated that the deformation rate was less than 0.7 mm/d, which was beneficial to the long-term stability of CSC and MPC. The implementation of this restoration project can provide a reference for other similar projects.