Shanxi Lu'an Mining Group, Yuwu Coal Mining Co., Ltd.
School of Mine Safety,North China Institute of Science and Technology

为研究断层附近煤岩体应力分布特征,以余吾煤矿N2102工作面为工程背景,采用FLAC3D数值模拟软件,将模型监测点位置与实际地应力钻孔位置进行拟合,对工作面断层岩体地应力进行反演化模拟。结果表明:断层影响范围从断层面向两侧扩展,垂直应力在断层两侧形成了“低—高—低”分布特征;在断层下盘区域最大水平主应力略小于断层上盘区域,差值约为0.5MPa;断层上盘的影响范围约为70m,断层下盘的影响范围约为30m。

In order to study the stress distribution characteristics of coal and rock masses near faults, theN2102 working face of Yuwu coal mine is taken as the engineering background.FLAC3D numerical simulationsoftware is used to fit the monitoring points of the model with the actual stress drilling positions, and the stressof the fault rock mass in the working face is inverted and simulated.The results show that the influence rangeof the fault extends to both sides of the fault surface, and the vertical stress forms a " low high low" distributioncharacteristic on both sides of the fault.The maximum horizontal principal stress in the lower fault zone isslightly lower than that in the upper fault zone, with a difference of about 0.5 MPa.The impact range of thehanging wall of the fault is about 70 m, and the impact range of the lower wall of the fault is about 30m.