采动引起的断层错动是诱发矿震和断层冲击矿压的主要原因之一。在现有的数值模拟研究中，断层上测点的数量较少，以致于对断层各处力学状态全貌的了解较为困难。而且，针对煤层应力分布的研究通常仅限于垂直应力（支承压力），而对其它应力尚缺乏了解。为研究采动条件下断层附近应力时空分布，采用FLAC3D建立了正断层上盘开采的数值模型。模型中共包括13个岩层和1个45°倾角的正断层，通过计算获得了工作面从断层上盘推进过程中断层各处及附近煤层应力的时空分布规律。监测了断层上盘断层上的22个节点以获取断层各处力学状态全貌。研究发现，在工作面推进过程中，断层上存在1个压紧区及1个或多个松动区；断层上的压紧区较为安全，压紧区上、下方松动区的正应力越来越低，当工作面邻近断层时该区的断层区段多趋于危险，该区范围最大为78 m；断层上盘煤层紧邻工作面煤壁的垂直、水平和切应力峰值分别位于煤壁前方7.5～10.5、10.5～15.5和11.5～12.5 m；断层下盘煤层3种应力最大值均上升或有上升趋势。当工作面煤壁距断层的水平距离由40 m减小至20 m时，断层上盘煤层垂直、水平和切应力受断层影响较显著的区域通常分别在距断层3.5、10.5 m和3.5 m以内。

One main reason for mining earthquakes and fault rockbursts is the fault movement induced by mining. In the previous numericalsimulation, monitored nodes are few so that a full understanding of the overall mechanical status on the fault is difficult. Moreover, inthe past simulation for the stress distribution of the coal seam, the vertical stress (abutment pressure) is focused on, but not for the otherstresses. To study stress distributions of the fault and coal seam in the vicinity of the fault, a numerical model of hanging wall mining wasbuilt in FLAC3D. In the model, thirteen rock strata and one normal fault with a dip of 45° were included. Spatiotemporal distributions of thefault and coal seam in the vicinity of the fault were obtained during the mining process. Twenty two nodes on the fault in the hanging wallwere monitored to obtain the overall mechanical status on the fault. The following numerical results were obtained. As the working faceadvances, there are one compressing zone and one or more loosening zones on the fault. The compressing zone on the fault is safe. As theworking face advances, the normal stress in loosening zones which are above and below the compressing zone becomes low, and the maximumsize of upper loosening zones is about 78m. Fault segments in upper loosening zones become dangerous when the coal wall of the working face is close to the fault. As the working face advances, peaks of vertical, horizontal and shear stresses of the coal seam in the vicinityof the coal wall of the working face in the hanging wall are 7.5 m−10.5 m, 10.5 m−15.5 m and 11.5 m−12.5 m ahead of the coal wallof the working face, respectively. As the working face advances, three kinds of maximum stresses of coal seam in the footwall increase orshow an increasing trend. As the horizontal distance between the fault and the coal wall of the working face decrease from 40 m to 20 m,changes in sizes of regions of vertical, horizontal and shear stresses of the coal seam, which are affected by the fault apparently in thehanging wall, are negligible, and sizes of these regions close to the fault are 3.5 m, 10.5 m and 3.5 m, respectively.