深部急倾斜煤层开采灾害防控及力学行为研究  

Study on Prevention and Control of Mining Disaster and Mechanical Behavior of Deep Steep Coal Seam

作　　者：王宁 WANG Ning(Weijiadi Coal Mine,Gansu Jingyuan Coal Industry&Electricity Power Co.,Ltd.,Baiyin 730900,China)

机构地区：[1]甘肃靖远煤电股份有限公司魏家地煤矿,甘肃白银730900

出　　处：《煤矿安全》2020年第9期205-210,共6页Safety in Coal Mines

摘　　要：针对深部煤层开采动力灾害量级大、破化程度高、防治难等问题,采用理论分析的方法,首先依据王家山煤矿深部急倾斜煤层开采过程中煤岩体的微震数据,采用CMEAS算法对微震台网进行优化,获得了最优台网布局;其次,构建了微震多参量综合预警指标体系,并根据现场的实际情况,统计分析开采过程中监测数据的危险判断标准;最后,在最佳微震台网体系下,基于现场微震监测数据,探究出开采过程中工作面顶底板岩层及正前煤层震动时空演化规律。另外,采用数值计算方法模拟工作面开采过程中的煤岩体位移场和应力场的变化情况、周边断层的活化模式,得到了因深部开采扰动而导致的力学响应规律。In view of the problems such as large-scale dynamic disaster,high degree of destruction and difficult prevention and control in deep coal mining,the theoretical analysis method is adopted.Firstly,based on the micro-seismic data of coal and rock mass in the mining process of deep steep coal seam in Wangjiashan Coal Mine,the CMEAS algorithm is used to optimize the micro-seismic network to obtain the optimal network layout.Secondly,the multi-parameter comprehensive early warning index system of micro-seismic is constructed;according to the actual situation of the site,the risk judgment standard of monitoring data in the mining process is analyzed.Finally,under the best micro-seismic network system,based on the field micro-seismic monitoring data,the temporal and spatial evolution law of the vibration of the roof and floor strata and the front coal seam in the mining process is concluded.In addition,the numerical calculation method is used to simulate the change of displacement field and stress field of coal and rock mass in the mining process of the working face,and the activation mode of peripheral faults,thus the mechanical response law caused by the disturbance of deep mining is obtained.

关 键 词：动力灾害 急倾斜煤层 时空演化 力学响应 微震监测 

分 类 号：TD324+.1[矿业工程—矿井建设]