临近断层的工作面开采诱发断层活化机理研究  

Study on the Mechanism of Fault Activation Induced by Mining near Fault Zone

作　　者：郭寿松 GUO Shou-song(CCTEG Chongqing Research Institute, Chongqing 400037, China;State Key Laboratory of the Gas Disaster Detecting, Preventing and Emergency Controlling, Chongqing 400037, China)

机构地区：[1]中煤科工集团重庆研究院有限公司 [2]瓦斯灾害监控与应急技术国家重点实验室

出　　处：《煤炭工程》2019年第7期93-97,共5页Coal Engineering

摘　　要：基于临近断层构造区工作面开采易诱发冲击地压事故的工程背景,提出了建立断层构造区工作面开采的力学模型并对其计算分析,结果表明:工作面采动对断层弱面造成扰动影响,按距离可分为远场和近场扰动效应;远场采动诱发断层活化时,断层弱面上粘合接触点统计上的破坏形式决定了断层弱面是稳滑状态还是粘滑状态;近场采动诱发断层构造活化时,采掘工作面位于断层下盘岩层时,断层岩块发生向上、向下剪滑失稳及断层岩块张拉离层失稳危险性高于上盘开采方式。Based on the engineering background that it is easy to induce rock burst accidents during the mining of working face near fault structure area,a mechanical model of working face mining in fault structure area is proposed and its calculation and analysis are carried out. The results show that the disturbance effect of mining on weak fault surface can be divided into farfield disturbance effect and near-field disturbance effect according to the distance;and the far-field disturbance effect can be divided into long-field disturbance effect and near-field disturbance effect. When induced fault activation occurs, the statistical failure form of the bonding contact points on the weak fault surface determines whether the weak fault surface is stable or stick-slip;when induced by near-field mining,when the mining face is located in the lower wall of the fault,the upward and downward shear-slip instability of the fault block occurs and the tension-separated layer of the fault block loses. The stability risk is higher than the upper mining method.

关 键 词：断层弱面 工作面开采 断层活化 冲击地压 动载扰动 

分 类 号：TD324[矿业工程—矿井建设]