受矿井地质条件、开采布局及采掘接续不合理等影响，工作面布置时会留设孤岛工作面，严重影响矿井安全开采。为解决切眼外错下孤岛工作面开采冲击危险的难题，以高庄煤矿3_上1105孤岛工作面为例，采用理论分析、数值模拟、数据统计与分析相结合的研究方法，分析了孤岛工作面开采时覆岩结构特征、切眼外错区域应力分布规律以及巷道围岩稳定性。结果表明：切眼外错下3_上1105工作面开采期间超前支承应力峰值达到54.1 MPa，基于巷道围岩受力状态及变形量确定了冲击危险区域主要分布在3_上1107工作面切眼前后0~30 m范围。针对切眼外错区域采取了大直径钻孔卸压，通过现场监测及检验，微震、钻屑均未超过预警临界值，卸压解危效果良好。

Under the influence of unreasonable geological conditions, mining layout and excavation connection, island working face will be set up in the layout of working face, which seriously affects the safe mining of the mine. In order to solve the problem of rock burst risk in the island working face of the cutting-off area, taking the 3 upper 1105 island working face in Gaozhuang Coal Mine as an example, the research method combining theoretical analysis, numerical simulation, data statistics and analysis is adopted to analyze the overlying structure characteristics, stress distribution law in the cutting-off region and roadway surrounding rock stability during the mining of the island working face. The results show that the peak stress of the leading support reaches 54.1 MPa during the mining of the 3 upper 1105 working face of the cutting-off area, and the impact risk area is determined based on the stress state and deformation of the surrounding rock of the roadway, which is mainly distributed in the range of 0-30 m before and after the cutting-off of the 3 upper 1107 working face. For the cutting-off region, large-diameter drilling hole was used to relieve pressure, and through on-site monitoring and inspection, micro-seismic and drilling cuttings did not exceed the critical value of early warning, and the effect of pressure relief and crisis relief was good.