正断层活化诱发冲击地压危险性研究  

Study on Risk of Rock Burst Induced by Normal Fault Activation

作　　者：许磊[1] 魏世明[1] 

机构地区：[1]河南理工大学能源科学与工程学院,河南焦作454003

出　　处：《煤矿安全》2015年第5期54-57,共4页Safety in Coal Mines

基　　金：国家自然科学基金资助项目(51004042)

摘　　要：采用FLAC3.03D数值模拟软件,以接触面单元模拟断层上下盘构造关系,模拟在正断层地质构造下,工作面从断层下盘向断层面推进过程中,矿山压力分布规律以及断层带位移变化规律。研究结果表明,在正断层地质构造下,下盘工作面推进过程中,距断层面距离不断减小,断层带位移发生变化;断层面上应力变化受采动影响活化范围在断层面前方40 m处,剪切应力与法向应力随工作面的推进逐渐增大,剪切应力变化高于法向应力,距离断层面越近,诱发冲击危险性增大。Using numerical simulation software FLAC3.0^3D , the contact surface element is used to simulate the fault footwall structure, and the effect of mine pressure distribution and fault displacement variation during the coal mining operation from the footwall to the fault plane. The result shows that the displacement change when the distance of footwall face from the fault plane is decrease during the advancing in normal fault structure ; fault stress changes affected by coal mining on the surface of activated scope is 40 m in front of the fault ; shear stress and normal stress increase with the increase of working face advancing gradually ; the change of shear stress is higher than normal stress ; the closer distance from fault plane, the greater rock burst induced.

关 键 词：正断层 下盘工作面 数值模拟 冲击地压 危险性 

分 类 号：TD324[矿业工程—矿井建设]