【作者】 李青锋； 王卫军； 彭文庆； 彭刚；

【Author】 LI Qingfeng~(1,2),WANG Weijun~(1,2),PENG Wenqing~(1,2),PENG Gang~(1,2) (1.Hunan Key Laboratory of Safe Mining Techniques of Coal Mines,Hunan University of Science and Technology,Xiangtan, Hunan 411201,China;2.School of Energy and Safety Engineering,Hunan University of Science and Technology, Xiangtan,Hunan 411201,China)

【机构】 湖南科技大学煤矿安全开采技术湖南省重点实验室； 湖南科技大学能源与安全工程学院；

【摘要】 为防止岩溶因断层活化而引发突水,探讨断层在采动条件下的活化规律及其对南方煤矿岩溶突水的影响。首先根据断层的形成机制分析各类断层形成的应力环境,得到断层活化的应力条件;然后分析工作面推进过程中的采场应力场和岩体运动规律,次生的垂直应力和水平应力不均衡变化是断层采动活化的主要原因;最后分析断层采动活化引发岩溶突水的机制,断层活化导致导水裂隙带高度增加,从而破坏隔水层导通上覆承压岩溶含水层,引发矿井岩溶突水事故。更多还原

【Abstract】 For scientifically and effectively preventing karst water bursting because of fault activation,both the mining activation rule of fault and coal mine karst water bursting effect by fault activation are studied.First of all, according to the fault formation mechanism,the stress environment of all kinds of fault forming had been analyzed,and the stress condition of coal-seam fault activating had been discussed.Then,based on the law of stress field in stope and motion of the rock mass in the course of mining process,the main reason of fault activating is because of the uneven changes between secondary vertical stress and horizontal stress.Finally,it is analyzed that water-inrush mechanism of karst is initiated by activation of fault after coal extraction.Fault activation leads to the height of water flowing fractured zone increasing,and the karst aquifer is got through because aquifuge is failure,so water inrush accident is occurred.更多还原