关键词: 房柱式采空区, 区段煤柱, 来压规律, 压架, 工作面调整

Abstract: The 4205 working face of Haoda Coal Mine is located in 4-2 coal seam. There is room-pillar goaf in overlying 3-2 coal seam. Influenced by coal pillars left over from overlying coal seam, the mining process of 4205 working face is prone to sudden and violent roof pressure, and the law of pressure is not obvious, and the support is frequently crushed. By means of field measurement and theoretical analysis, the main pressure causes of working face are analyzed. Combining with the theoretical criterion of pillar failure and instability in room-pillar goaf, it is concluded that the roof is prone to severe weighting near the edge of room-pillar goaf or blasting goaf, and the support is directly damaged. By shortening the inclination length of the working face, the improvement measures of the working face are put forward to reduce the cross-area range of the upper room-pillar goaf, thereby reducing the risk of large-scale roof collapse of the goaf, and good application results are obtained in the field, which provides the experience of efficient and safe mining for mines with similar conditions.