论文部分内容阅读
为分析研究采动诱导逆冲断层的滑移规律特征,应用FLAC3D数值模拟软件,以义马煤矿25110工作面地质条件为原型,对采动诱导逆冲断层的滑移效应进行了数值模拟,分析了工作面回采前后的剪应力分布规律。结果表明:由于大面积采空区的存在,使逆冲断层下盘覆岩发生了剪切滑移作用,产生了较大的剪应力值,导致将要回采的工作面处于较强冲击危险区。同时,在工作面回采过程中,当工作面回采达到180 m左右时,工作面远离逆冲断层,受断层下盘的影响逐渐减小,此时高剪应力区域面积差值也不断减小,冲击危险状态降低。
In order to analyze and study the characteristics of slipping regularity of induced induced thrust in mining, FLAC3D numerical simulation software was used to conduct the numerical simulation of the slip effect of mining induced thrust in the 25110 working face of Yima Coal Mine. The distribution of shear stress before and after mining face. The results show that due to the large area of goaf, the shearing slip occurs in the overlying strata of the thrust plate, resulting in a large shear stress value, leading to the mining face to be in a strong impact hazard zone. In the meantime, when the working face is dug back to about 180 m during the process of face mining, the working face is far away from the thrust fault and the influence of the footwall is gradually reduced. At this moment, the difference of the area of the high shear stress region is also decreasing, Shock hazard status reduced.