关键词: 切顶卸压, 相邻工作面, 重复扰动, 煤柱稳定性, 承载强度

Abstract: In order to ensure the safe pushing of the 2201 working face of Wangcaihuopan coal mine in the overlying large-area housing mining area and the adjacent housing mining area outside the return air tunnel, analyzed the risk of coal spontaneous combustion of overlying housing mining area in 2-2 upper coal seam and the adjacent housing mining area in 2-2 coal seam during the mining process of the 2201 working face combined with the actual situation of the production site, and the main air leakage channels and areas are obtained. The results showed that the air leakage passage between the housing mining area and the working face is mainly the compound goaf formed by the roof collapse and the housing mining area, which has a certain risk of coal spontaneous combustion. For this reason, targeted coal spontaneous combustion prevention and control technologies have been put forward from the aspects of coal spontaneous combustion indicator gas monitoring, goaf grouting, nitrogen injection, and wind plugging prevention technologies, which effectively suppress and prevent coal in old goaf areas and ensures the safety of the 2201 working face.