(1. School of Civil and Resource Engineering，University of Science and Technology Beijing，Beijing 100083，China；2. Shandong Energy Group Company Limited，Jinan，Shandong 250014，China；3. Hebei State Key Laboratory of Mine Disaster Prevention，North China Institute of Science and Technology，Langfang，Hebei 101601，China；4. Shandong Xinjulong Energy Co.，Ltd.，Heze，Shandong 274918，China；5. School of Earth Science and Engineering，Hohai University，Nanjing，Jiangsu 211100，China)
Abstract：Rockburst induced by the overall instability of fault coal pillar in the stope under thick overburden soil exhibits destructive characteristics such as high concealment，strong destructiveness，difficulty in protection，and long duration，which is challenging to predict and prevent effectively in the coal mine field. Taking the 2305S working face of a mine in the Juye coal field as the engineering background，this study adopts theoretical analysis，numerical simulation，and field measurement to investigate the mechanism of rockburst induced by the overall instability of fault coal pillar in the stope under thick overburden soil. The conclusions are as follows: the study discusses the spatial structure and mechanical characteristics of the initial and periodic interactions of rock-soil strata in the stope under thick overburden soil，designs a calculation method for the load-bearing strata to bear the transferred load，overlying self-weight load，and fault structural load，and proposes a mechanical criterion for the rockburst induced by the overall instability of the fault coal pillar in the stope under thick overburden soil. According to the evolution law of simulated stress growth rate，the mining process of fault coal pillars is divided into energy storage stage and critical stage，in which the overall instability shock hazard level rapidly increases during the critical phase. The mechanism of rockburst induced by the overall instability of fault coal pillar in the stope under thick overburden soil is revealed: the fault coal pillar，formed by the intersection of the fault and the goaf，carries a high level of base stress. When the working face advances to the initial interaction phase of the rock-soil strata，the transferred load from the trend strata increases the stress level of the fault coal pillar，while its bearing area decreases continuously under the conditions of continuous mining. When the load exceeds the instability threshold of the elastic bearing zone，a rockburst caused by overall instability occurs. A control plan for this type of rockburst is designed，including pre-mining overall impact risk assessment，well-ground joint regional monitoring-nuclear stress local early warning，and graded bearing multi-layer pressure relief design.
张 翔1，朱斯陶1，2，张修峰2，姜福兴1，刘金海3，陈 洋2，万 晓4，杨 涛3，朱 淳5，李佳洁1. 深厚表土综放采场断层煤柱整体失稳型冲击地压机制研究[J]. 岩石力学与工程学报, 2024, 43(3): 713-727.
ZHANG Xiang1，ZHU Sitao1，2，ZHANG Xiufeng2，JIANG Fuxing1，LIU Jinhai3，CHEN Yang2，. Research on the mechanism of overall instability type rock burst of fault coal pillars in deep topsoil fully mechanized top coal caving mining area. , 2024, 43(3): 713-727.
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2024, Vol. 43 
