对晋中南现代构造应力场进行了数值模拟．模拟结果显示，现代构造应力场主应力差在沁水含煤向斜轴部存在着呈北东向展布的高值条带，且最大主应力为压应力；其应力水平和应力性质与应力降和小震综合断面解资料基本吻合；晋中南东部沁水含煤向斜内部产生近水平挤压应力场的动力来源于东部太行山和西部霍山的隆起和抬升；太原盆地中的近水平伸展应力场则与盆地深部塑性物质的上涌所导致的侧向拉伸有关． The numerical simulation of modern tectonic stress field in Jinzhongnan is carried out. The simulation results show that the main stress difference of modern tectonic stress field exists in the north eastward extensional axis of Qinshui coal seam, and the maximum principal stress is compressive stress. The stress level, stress property and stress The data of the comprehensive cross-section of the lower and lower earthquakes are basically in agreement with each other. The dynamic force of the horizontal crustal stress field generated by the Qinshui coal-bearing syncline in the eastern part of Jinzhongnan originates from the uplift and uplift of the Taihang Mountain in the east and the Huoshan Mountain in the western part of the Taiyuan Basin. The field is related to the lateral stretching caused by the upwelling of plastic material in the deep basin.