文献类型：期刊文献

英文题名：Study on coal wall spalling mechanism of large mining height working face based on folding mutation theory

作者：Li, Guosheng Zhang, Hui Li, Mengzhen Shen, Zhenhua Tian, Anfeng Wang, Longjing

第一作者：李国盛

通信作者：Li, GS[1];Zhang, H[1]

机构：[1]Guizhou Inst Technol, Inst Min Engn, Guiyang 550003, Peoples R China;[2]Guizhou Coal Mine Design & Res Inst Co Ltd, Guiyang 550003, Peoples R China;[3]Guizhou Lvyun Energy Co, Guiyang 550003, Peoples R China;[4]CCTEG Chongqing Res Inst, Chongqing 400037, Peoples R China

第一机构：贵州理工学院矿业工程学院

通信机构：corresponding author), Guizhou Inst Technol, Inst Min Engn, Guiyang 550003, Peoples R China.|贵州理工学院矿业工程学院;贵州理工学院;

年份：2026

卷号：16

期号：1

外文期刊名：SCIENTIFIC REPORTS

收录：;Scopus(收录号：2-s2.0-105039273780);WOS:【SCI-EXPANDED(收录号:WOS:001768307200001)】；

基金：This work was supported by National Natural Science Foundation of China (Grant No.52164007), Guizhou Provincial Science and Technology Projects (No. Qian Ke He Jichu-[2024] Qingnian 361 and No. Qian Ke He Jichu MS[2025] 187) and the Open Fund of Guizhou Provincial Laboratory of Intelligent Development and Efficient Utilization of Energy (GEL-KY-2025-007).

语种：英文

外文关键词：Instability failure; Rib spalling; Plastic deformation; Folding catastrophe model

摘要：Aiming at the unclear mechanism behind the sudden instability of coal wall spalling, this study takes a fully-mechanized mining face with large mining height as an example. Through theoretical analysis and numerical simulation, the energy release mechanism governing the instability of the coal shell structure is revealed, and a theoretical failure model for spalling prediction is established. Based on the mechanical characteristics of coal shell failure and employing the theory of plastic strain localization in coal mass, a catastrophe model for coal wall instability was developed by analyzing the incremental relationship between coal shell deformation and the work done by deviatoric stress. The research outcomes derived quantitative expressions for energy release and proposed the expression for deviatoric stress strain energy, clarifying that energy exceeding a critical threshold is the fundamental cause of sudden spalling. Furthermore, expressions for the release of volumetric strain energy and gas internal energy were derived, revealing the coupling mechanism between internal and external stresses. The research outcomes can be directly applied to predict the risk of rib spalling by monitoring the degree of energy accumulation and to optimize support parameter design based on the energy release threshold, providing theoretical guidance for safe mining in high-stress coal seams. This study achieves a breakthrough from phenomenological description to mechanistic quantification, holding significant practical value for the prevention and control of rib spalling disasters in fully-mechanized mining faces.