【摘要】 石圪台煤矿31103综采工作面采用沿空留巷工艺，对沿空留巷工作面开展切顶卸压技术研究，从切顶参数设计、留巷关键参数确定、数值模拟分析3个角度，确定在切顶高度12.7 m,切顶角度45°,留巷宽度为4.8 m时，砼墙及留巷围岩在水平应力、垂直应力、水平位移、垂直位移、塑性区变化均不大。从现场的工作面压力、单元支架压力、围岩变化分析可知，采用切顶卸压可提高留巷围岩的稳定性，确保下个综采工作面回采不受影响。更多还原

【Abstract】 The 31103 fully mechanized mining face of Shigetai Coal Mine adopts the technology of retaining roadway along the goaf, and conducts research on top cutting and pressure relief technology for the working face along the goaf. From the perspectives of top cutting parameter design, key parameters of roadway retention, and numerical simulation analysis, it is determined that when the top cutting height is 12.7 m, the top cutting angle is 45 °, and the roadway width is 4.8 m, the changes in horizontal stress, vertical stress, horizontal displacement, vertical displacement, and plastic zone of the concrete wall and surrounding rock of the roadway are not significant. From the analysis of the working face pressure, unit support pressure, and surrounding rock changes on site, it can be concluded that using top cutting and pressure relief can improve the stability of the surrounding rock in the reserved roadway, ensuring that the next fully mechanized mining face is not affected.更多还原