千米深井采面过上覆停采线煤柱冲击矿压防治研究

Study on the rock burst prevention working face with 1000 meters buried depth during mining through the covering coal pillar

基于曙光煤矿95208工作面的实际条件建立冲击矿压控制体系,对其进行冲击危险分析。结果表明:工作面过上覆7煤停采线进入煤柱区开采覆岩运动剧烈、应力高度集中,整体处于高冲击危险区;工作面主要冲击影响因素为停采线煤柱、大采深、强冲击倾向性等;工作面回采前进行大直径钻孔、顶板预裂爆破预卸压,回采期间采取煤体爆破卸压解危措施。研究成果为类似条件下煤岩动力灾害防治提供借鉴和指导。

Based on the actual conditions of the 95208 working face of the dawn coal mine, the impact pressure control system is established, and the rock burst hazard is analyzed, The results showed that working face is belong to the high impact danger zone when mining through the covering 7 coal stopping coal pillar; the main impact factors of working face rockburst are the stopping mining pillar line, great mining depth, strong impact tendency, using the large diameter bored, roof pre-split blasting pressure relief in advance, taking coal blasting pressure relief measures during mining to solve the crisis. The research results provide reference and guidance for the prevention and control of coal and rock dynamic disasters under similar conditions.