正断层上盘边角煤开采诱发断层活化规律

Activation Laws of Normal Fault Induced by Edge Coal Mining in Upper Wall

为研究边角煤工作面采动断层活化规律,基于兴隆庄煤矿肖家庄三号正断层上盘5313工作面遗留边角煤开采,采用数值模拟研究工作面采动不同层位断层面应力和断层滑移量演化规律,分析采动诱发断层活化失稳的可能性。研究结果表明:随工作面与断层距离减小,断层面剪切应力与法向应力增大,两者比值升高,同时断层滑移量随之增长,断层活化失稳可能性增大;当工作面距断层小于30 m时,断层面应力比值显著升高,滑移量剧烈增大,断层活化最为显著。

In order to study the activation laws of mining fault in the edge coal face, based on the mining of the residual edge coal in No.3 normal fault in Xinlongzhuang Coal Mine 5313 working face, the evolution laws of fault stress and fault slip in different strata are studied by numerical simulation and the possibility of fault activation instability induced by mining is analyzed.The results show that with the decreasing of the distance between the face and the fault, the shear stress and normal stress of the fault plane increase, their ratio increases, and the slip of the fault also increases, and the possibility of fault activation instability increases. When the distance from the face to the fault is less than 30 m, the activity of fault is the most obvious.