摘要
针对大采深影响下断层切割煤柱区域冲击地压防治难题,采用理论分析、现场实测方式对断层切割煤柱区域冲击危险性进行了分析与研究,得到如下结论:断层切割煤柱区域在静载条件下趋近于失稳状态,推采过程中动静载应力叠加,煤柱冲击危险性升高;通过断层切割煤柱失稳模型和现场微震、应力及其它数据监测分析发现,工作面初采阶段及单、双工作面见方阶段,微震能量积聚显著,应力集中区域明显,在此过程中断层切割煤柱存在整体失稳现象,通过大直径钻孔卸压、爆破预裂顶板及加强支护等冲击地压防护措施加强对此区域的冲击地压监测与防治,实现断层切割煤柱区域的安全回采。
Aiming at the problem of rock burst prevention and control in fault cutting coal pillar area under the influence of large mining depth,the theoretical analysis and field measurement are used to analyze and study the rock burst risk in fault cutting coal pillar area.The following conclusions are obtained:the fault cutting coal pillar area tends to be unstable under static load conditions,and the dynamic and static load stress superposition in the mining process increases the rock burst risk of coal pillar.Through the fault cutting coal pillar instability model and on-site microseismic,stress and other data monitoring and analysis,it is found that in the initial mining stage of the working face and the square stage of the single and double working faces,the microseismic energy accumulates significantly,and the stress concentration area is obvious.In this process,the fault cutting coal pillar has the overall instability phenomenon.Through the large diameter drilling pressure relief,blasting pre-splitting roof and strengthening support and other rock burst protection measures to strengthen the monitoring and prevention of rock burst in this area,the safe mining of the fault cutting coal pillar area is realized.
作者
肖自义
张兆举
宋韦晓
田国庆
王艳飞
常雁
XIAOZiyi;ZHANG Zhaoju;SONG Weixiao;TIANGuoqing;WANGYanfei;CHANG Yan(Shandong Bureau of National Mine Safety Supervision Bureau,Jinan250000,China;Beijing Anke Xingye Mine Safety Technology Research Institute,Beijing 102200,China;Shandong Shuanghe Coal Mine Co.,Ltd.,Jining272100,China)
出处
《煤矿现代化》
2024年第4期86-90,共5页
Coal Mine Modernization
关键词
冲击地压
断层切割煤柱
动静载叠加
微震监测
防治措施
rock burst
fault cutting coal pillar
dynamic and static load superposition
microseismic monitoring
prevention measures
