文献类型：期刊文献

英文题名：Study on the broken law of overlying rock in the steeply dipping medium-thick coal seam with thick and hard roofs

作者：Ping, Wang Zilong, Zeng Yongjian, Zhu Yafei, Luo Ze, Zhou Sichao, Wang Shichong, Liu

第一作者：Ping, Wang

通信作者：Zilong, Z[1]

机构：[1]Hunan Univ Sci & Technol, Sch Resources Environm & Safety Engn, Xiangtan 411201, Peoples R China;[2]Hunan Univ Sci & Technol, Work Safety Key Lab Prevent & Control Gas & Roof D, Xiangtan 411201, Peoples R China;[3]Hunan Univ Sci & Technol, Hunan Prov Key Lab Safe Min Tech Coal Mines, Xiangtan 411201, Peoples R China;[4]Guizhou Inst Technol, Sch Min Engn, Guiyang 550001, Peoples R China

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

通信机构：corresponding author), Hunan Univ Sci & Technol, Sch Resources Environm & Safety Engn, Xiangtan 411201, Peoples R China.

年份：2025

卷号：28

外文期刊名：RESULTS IN ENGINEERING

收录：EI(收录号：20254419439876);Scopus(收录号：2-s2.0-105020387021);WOS:【ESCI(收录号:WOS:001601213900015)】；

基金：Funding This research was funded by the National Science Foundation of China (Nos. 52174110, 52274119 and 52304214) .

语种：英文

外文关键词：Steeply dipping coal seam; Thick and hard roof; Physical similarity simulation; Multidimensional monitoring; Medium-thrick coal seam

摘要：To investigate the fracture behavior of thick and hard roofs in steeply dipping, medium-thick coal seams, similarity simulation and FLAC3D numerical modeling were conducted using the 12,112 steeply dipping working face at Tieshan South Mine as the engineering background. Combined with multi-dimensional stress-displacement monitoring, the study found that the ratio of the caving zone to the gob during mining of steeply dipping, medium-thick coal seams is 8.3. After roof failure, a "low-level hinged beam-high-level simply supported beam" bearing structure forms within the gob, which can effectively inhibit deep roof deformation and failure. Based on material mechanics analysis, four potential fracture points on the inclined long beam were identified, and a fracture and gob-side entry retaining mechanical model under steeply dipping, medium-thick coal seam conditions was established. The study reveals that controlling the low-level hinged block B is the key to successful retained entry implementation. Finally, a scheme integrating roof cutting and pressure relief, roadside filling, and strong rib stabilization is proposed for retained entry construction.