承压水上工作面采动诱发断层活化及煤柱留设研究  

Mining-induced fault activation and pillar retention of working face above confined water

作　　者：吴俊达 解建 孙亚楠 闫奋前[1,2] WU Jun-da;XIE Jian;SUN Ya-nan;YAN Fen-qian(School of Mining and Safety Engineering,Shandong University of Science and Technology,Qingdao 266590,China;State Key Laboratory of Mining Disaster Prevention and Control Co-founded by Shandong Province and the Ministry of Science and Technology,Shandong University of Science and Technology,Qingdao 266590,China;Wugou Coal Mine of Anhui Hengyuan Coal Power Co.,Ltd.,Suzhou 234000,China)

机构地区：[1]山东科技大学矿业与安全工程学院,山东青岛266590 [2]山东科技大学矿山灾害预防控制省部共建国家重点实验室培育基地,山东青岛266590 [3]安徽恒源煤电股份有限公司五沟煤矿,安徽宿州234000

出　　处：《煤炭工程》2020年第5期133-137,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：为加强矿井水灾害防治,保障矿井安全开采,以五沟煤矿1026工作面实际地质条件为基础,针对工作面回采诱发断层活化突水问题,采用室内相似材料模拟试验与FLAC3D数值模拟相结合的方法,研究了工作面采动影响下断层的活化特征及煤柱留设情况。研究结果表明:运用相似材料试验分析可知,随着工作面不断推进,当DF68断层下盘防水煤柱小于20m时,DF68断层活化程度明显加剧,工作面突水威胁也将更大;采用数值模拟对工作面推进过程中的DF68断层活化特征、渗流特性及断层防水煤柱的留设进行了系统的分析,得到了DF68断层防水煤柱最小留设宽度;结合相似材料试验、数值模拟综合分析确定DF68断层下盘防水煤柱留设宽度为20m,该宽度在保证工作面回采安全的基础上可进一步提高资源回采率。In order to strengthen the prevention of mine water disasters and ensure safe mining,based on the actual geological conditions of 1026 working face in Wugou Coal Mine,in view of the mining face induced fault activation water inrush,similar material simulation test and FLAC3Dsoftware simulation are carried out. The activation characteristics of faults and coal pillar placement under the influence of mining face are studied. The similar material test results show that,with the continuous advancement of the working face,when the waterproof coal pillar of the DF68 fault is less than 20 m,the activation degree of the DF68 fault will be significantly increased,and the threat of water inrush from the working face will be greater. The DF68 fault activation characteristics, seepage characteristics, and the retention of fault waterproof coal pillars during the advancement of the working face are systematically analyzed using FLAC3D,and the minimum remaining width of DF68 fault waterproof coal pillars is obtained. Combined with similar material tests and numerical values,the comprehensive analysis of the simulation determined that the width of the waterproof coal pillar in the lower plate of the DF68 fault is set to 20 m. This width can improve the resource recovery rate on the basis of ensuring the safety of the mining face.

关 键 词：承压水 断层活化 煤柱留设 相似材料试验 

分 类 号：TD822.3[矿业工程—煤矿开采]