随着煤矿开采深度加大、瓦斯含量大等情况的出现，巷道布置及围岩地质条件日趋复杂，易发生变形，安全问题较为突出，此时可采用水力压裂等方式切断、弱化悬顶结构，降低采场压力。对巷道水力压裂前后进行对比分析，将工作面内微震事件发育特征进行了深入分析。压裂后顶板事件活动性增强，底板活动性减弱，且平面分布上，压裂后更加分散，分布范围更广。压裂后上覆围岩破裂范围增大，压力传导通畅，近煤层卸压明显。煤层底板下0 ~ 5 m近煤层事件占比增大了53.5%，底板最大扰动深度减小16.7%，无本溪灰岩以深事件发育。结合微震数据及现场反馈，压裂后工作面来压周期变短，步距变小，压裂后能量值大于5 000 J的事件占比减小，且垂向分布由集中式向分散式转变，采场内应力释放舒缓，动压危害减小，巷道变形有效缓解，为工作面安全回采提供了保障。

With the increase of mining depth and gas content in coal mine, roadway layout and surrounding rock geological conditions were becoming more and more complex. Deformation was easy to occur, and safety problems were more prominent. At this time, hydraulic fracturing and other methods could be used to cut off and weaken the suspended roof structure and reduce the stope pressure. The comparative analysis of the roadway before and after hydraulic fracturing was carried out, and the development characteristics of microseismic events in the working face were analyzed in depth. After fracturing, the activity of the roof event was enhanced, the activity of the floor was weakened, and the plane distribution was more dispersed and the distribution range was wider after fracturing. After fracturing, the fracture range of the overlying surrounding rock increased, the pressure conduction was smooth, and the pressure relief near the coal seam was obvious. The proportion of events near coal seam under the coal seam floor in 0-5 m increased by 53.5 %, the maximum disturbance depth of the floor decreased by 16.7 %, and there was no event development below Benxi limestone. Combined with microseismic data and field feedback, after fracturing, the pressure period of the working face became shorter, the step distance became smaller, the proportion of events with energy value greater than 5 000 J after fracturing decreased, and the vertical distribution changed from centralized to decentralized. The stress release in the stope was soothing, the dynamic pressure hazard was reduced, and the roadway deformation was effectively alleviated, which provided a guarantee for the safe mining of the working face.