承压水上含隐伏构造底板突水机理研究  

Water bursting mechanism of coal seam floor with concealed structure above confined water

作　　者：魏大勇 孙亚楠[2,3] 闫奋前 吴俊达 WEI Da-yong;SUN Ya-nan;YAN Fei-qian;WU Jun-da(Anhui Hengyuan Coal Electricity Group Co.,Ltd.,Lanxian 033599,China;State Key Laboratory of Mining Disaster Prevention and Control,Shandong University of Science and Technology,Qingdao 266590,China;Mining Engineering National Experimental Teaching Demonstration Center,Qingdao 266590,China)

机构地区：[1]山西岚县昌恒煤焦有限公司,山西岚县033599 [2]山东科技大学矿山灾害预防控制国家重点实验室培育基地,山东青岛266590 [3]矿业工程国家级实验教学示范中心,山东青岛266590

出　　处：《煤炭工程》2020年第3期93-97,共5页Coal Engineering

基　　金：国家重点研发计划项目子任务(2018YFC0604702);国家自然基金项目(51509149,51379119,51774199);山东省重点研发计划项目(2018GSF120009);安全生产重特大事故防治关键技术科技项目(gaoxiao-0008-2017AQ,shandong-0016-2018AQ);矿业工程一流学科建设专项(01CK00605,03CK01702)。

摘　　要：以昌恒煤矿9102工作面实际地质资料为基础,借助数值模拟与现场测试等手段,从底板应力分布特征与塑性区发育特征两方面分析了该工作面下隐伏构造对工作面推采的影响。研究结果表明:陷落柱等地质构造的存在,使得工作面回采时在地质构造前出现应力集中现象;工作面回采引发的底板岩体破坏形式主要以剪切破坏为主,且塑性区与陷落柱顶部靠近工作面一侧边界塑性区首先连通形成突水通道,进而引起底板突水;利用底板应变计监测工作面回采引发的煤层底板破坏情况,最终得出工作面回采引发的含隐伏构造底板的破坏深度与经验及理论公式的计算结果能保持一致,验证了现场测试方法的可行性及科学性,为承压水上底板含隐伏构造煤层的安全生产提供借鉴。Based on the actual geological data of 9102 working face in Changheng Coal Mine,influence of underlying concealed structure on mining face is analyzed from stress distribution characteristics and plastic zone development characteristics using numerical simulation and field test.The results show that stress concentrates in front of geological structures during mining.The primary mining-induced failure mode of the floor rock mass is shear failure,and the plastic zone in the floor connects to the plastic zone on the top of the collapse column at the working face side forming water channels and leading to water bursting;the floor strain gauge is used to monitor the mining-induced floor damage.And the monitored damage depth is consistent with the calculation results of empirical and theoretical formulas,the feasibility and scientificity of the field test method are verified.The study can provide references for the safe mining for coal seams above confined water with concealed structure in the floor.

关 键 词：承压水 隐伏构造 底板突水 应力分布 致灾机理 

分 类 号：TD745.2[矿业工程—矿井通风与安全]