深部大采高综采面厚硬岩层-煤柱结构失稳诱冲机理研究  

Mechanism of instability induced scour of thick hard rock-coal pillar structure in deep fully mechanized working face with large mining height

作　　者：张翔 朱斯陶 姜福兴[1] 刘金海 朱权洁[3] 史先锋 韩刚 魏晓虎 曹京龙 曲效成 ZHANG Xiang;ZHU Sitao;JIANG Fuxing;LIU Jinhai;ZHU Quanjie;SHI Xianfeng;HAN Gang;WEI Xiaohu;CAO Jinglong;QU Xiaocheng(School of Civil and Resource Engineering,University of Science and Technology Beijing,Beijing 100083,China;Shandong Energy Group Company Limited,Jinan 250014,China;North China Institute of Science and Technology,Hebei Province Mine Disaster Prevention Primary Laboratory,Langfang 101601,China;China Coal Energy Research Institute Co.,Ltd.,Xi’an 710054,China;Ordos Yihua Mining Resources Co.,Ltd.,Ordos 017399,China;Beijing Anke Xingye Technology Co.,Ltd.,Beijing 102200,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]山东能源集团有限公司,山东济南250014 [3]华北科技学院河北省矿井灾害防治重点实验室,河北廊坊101601 [4]中煤能源研究院有限责任公司,陕西西安710054 [5]鄂尔多斯市伊化矿业资源有限责任公司,内蒙古鄂尔多斯017399 [6]北京安科兴业科技股份有限公司,北京102200

出　　处：《岩土工程学报》2024年第12期2570-2579,共10页Chinese Journal of Geotechnical Engineering

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

摘　　要：厚硬岩层-煤柱结构失稳诱发型冲击地压是鄂尔多斯深部矿区典型的冲击地压模式,其发生机理尚不清晰,以鄂尔多斯深部矿区某矿30202工作面为工程背景,采用理论分析、数值模拟、现场实测等方法,研究了深部大采高综采面厚硬岩层-煤柱结构失稳诱冲机理,得出结论:探讨了深部大采高综采面厚硬岩层-煤柱结构的空间运动特征,建立了厚硬岩层-煤柱结构的力学模型并推导了其失稳诱冲的工程判据。揭示了厚硬岩层-煤柱结构失稳诱冲机理:区段煤柱承载基础应力来源于面内厚硬岩层组和临侧采空区铰接加载岩层自重,当面内厚硬岩层达到强度极限时发生“W”型破断并传递附加应力,区段煤柱承载的叠加应力超过其破坏阈值后发生局部甚至整体失稳冲击。数值模拟发现区段煤柱承载应力随厚硬岩层组的破断运动发生阶段性突增现象,厚硬岩层组“W”型两次破断运动传递的载荷是工作面附近区段煤柱失稳冲击的主要应力来源,其中二次破断释放的能量远高于初次破断。设计并实施了深部大采高综采面厚硬岩层-煤柱结构失稳诱冲的控制体系,包括承载煤柱强卸载、扰动区域强支护和推进速度强管控,效果评价验证了防冲体系能够保障工作面安全回采。The instability-induced rockburst of thick hard rock stratum-coal pillar structure is a typical rockburst mode in Ordos deep mining area,and its mechanism is still unclear.Taking the 30202 working face of a mine in Ordos deep mining area as the engineering background,the instability-induced rockburst mechanism of thick hard rock stratum-coal pillar structure in deep fully mechanized mining face with large mining height is studied by means of the theoretical analysis,numerical simulation and field measurement,and the following conclusions are drawn:The spatial movement characteristics of thick hard rock stratum-coal pillar structure in deep fully mechanized mining face with large mining height are discussed.The mechanism of instability-induced impact of the thick and hard rock stratum-coal pillar structure is revealed,i.e.,the foundation stress of the section coal pillar comes from the self-weight of the in-plane thick and hard rock stratum group and the adjacent mined-out area,when it reaches the strength limit,the in-plane thick and hard rock stratum breaks in a"W"shape and transmits additional stress,and when the superimposed stress of the section coal pillar exceeds its failure threshold,local or even whole instability impact occurs.It is found through the numerical simulation that the load transmitted by the"W"-shaped twice breaking motion of the thick and hard strata group is the main stress source of the instability impact of the coal pillar near the working face.The control system of instability-induced impact of the thick hard rock stratum-coal pillar structure in deep fully mechanized mining face with large mining height is designed and implemented,including strong unloading of bearing coal pillar,strong support in disturbed areas and strong control of advancing speed.The effectiveness evaluation verifies that the anti-impact system can ensure the safe mining of the working face.

关 键 词：冲击地压 厚硬岩层 区段煤柱 微震监测 

分 类 号：TD324[矿业工程—矿井建设]