巨厚土拱-孤岛煤柱结构失稳冲击机理研究  

Research on rockburst mechanism of structural instability in huge thick topsoil arch-island coal pillar

作　　者：闫才 朱斯陶 彭广林[2] 李士栋 孔震 周广飞 雒军莉 张浩 张翔 YAN Cai;ZHU Sitao;PENG Guanglin;LI Shidong;KONG Zhen;ZHOU Guangfei;LUO Junli;ZHANG Hao;ZHANG Xiang(School of Civil and Resource Engineering,University of Science and Technology Beijing,Beijing 100083,China;Huafeng Coal Mine,Xinwen Mining Group Co.,Ltd.,Tai’an Shandong 271413,China;Zhaolou Coal Mine,Yanmei Heze Energy&Chemical Co.,Ltd.,Heze Shandong 274705,China;Yankuang Xinjiang Energy Chemical Co.,Ltd.,Urumqi Xinjiang 830000,China;Shandong Xinjulong Energy Co.,Ltd.,Heze Shandong 274918,China)

机构地区：[1]北京科技大学土木与资源工程学院,北京100083 [2]新汶矿业集团有限责任公司华丰煤矿,山东泰安271413 [3]兖煤菏泽能化有限公司赵楼煤矿,山东菏泽274705 [4]兖矿新疆能化有限公司,新疆乌鲁木齐830000 [5]山东新巨龙能源有限责任公司,山东菏泽274918

出　　处：《中国安全生产科学技术》2025年第2期44-51,共8页Journal of Safety Science and Technology

基　　金：国家重点研发计划项目(2022YFC3004604);国家自然科学基金项目(52374076);中国科协青年人才托举工程资助项目(2021QNRC001)。

摘　　要：为了研究巨厚表土-孤岛煤柱组合结构致冲机理,以山东某煤矿1305工作面冲击地压事故为工程背景,采用数值模拟、理论分析、现场实测等方法,系统进行巨厚表土-孤岛煤柱组合结构的空间结构、失稳判据、冲击机制等研究。研究结果表明:通过数值模拟证实土压力拱的存在,说明土压力拱传递的巨厚表土自重为1305工作面整体失稳冲击的主要力源。通过研究巨厚表土采场推采荷载传递机制,建立组合结构工程力学模型,设计地层传递载荷估算方法,提出巨厚土拱-孤岛煤柱结构失稳冲击工程判据。揭示巨厚土拱-孤岛煤柱结构失稳冲击机理:厚表土采场顺序接续形成土压力拱结构,导致临侧孤立煤体承载高水平的支承压力,当孤岛煤柱承载的叠加应力满足动力失稳临界阈值时,土拱-煤柱结构发生整体组合失稳冲击。研究结果可为巨厚表土条件下的冲击地压防治提供参考。To study the mechanism of rockburst caused by the combination structure of huge thick topsoil-island coal pillar,the 1305 working face in a coal mine of Shandong Province was taken as the engineering background.The numerical simulation,theoretical analysis,field measurement,and other methods were used to systematically study the spatial structure,instability criteria,and rockburst mechanism of the combination structure of huge thick topsoil-island coal pillar.The results show that the existence of soil pressure arch is confirmed by numerical simulation,which indicates that the weight of the huge thick topsoil transferred by the soil pressure arch is the main force source of the overall instability impact of 1305 working face.By studying the load transfer mechanism of mining in huge thick topsoil stope,the engineering mechanics model of combination structure is established,then the estimation method of stratum transfer load is designed,and the engineering criterion for the rockburst of structural instability in huge thick topsoil arch-island coal pillar is proposed.The rockburst mechanism of structural instability of the huge thick soil arch-island coal pillar is revealed.The sequential succession of huge thick topsoil stope forms the soil pressure arch structure,resulting in a high level of support pressure carried by the isolated coal body on the adjacent side.When the superimposed stress of the island coal pillar meets the critical threshold of dynamic instability,the soil arch-coal pillar structure undergoes an overall combined instability rockburst.The research results can provide reference for the prevention and control of rockburst under the condition of huge thick topsoil.

关 键 词：冲击地压 巨厚表土 土压力拱 孤岛煤柱 

分 类 号：X936[环境科学与工程—安全科学]