基于支架载荷的冲击危险性分析及防治研究  

Risk Analysis of Rockburst Hazard Based on Support Loading and Its Prevention

作　　者：朱萌萌[1,2] 成云海[1,2] 冯飞胜[1,2] 任禹[1,2] 

机构地区：[1]安徽理工大学能源与安全学院,安徽淮南232001 [2]安徽理工大学煤矿安全高效开采省部共建教育部重点实验室,安徽淮南232001

出　　处：《安徽理工大学学报（自然科学版）》2015年第4期11-15,共5页Journal of Anhui University of Science and Technology:Natural Science

基　　金：国家自然科学基金资助项目(51174002;51274008)

摘　　要：针对某矿主采3煤层地质条件复杂易引发冲击危险的问题,结合3煤层及顶板的弱冲击倾向性,综合分析顶板岩层结构,建立老顶初次来压的力学模型,定性分析冲击危险性:老顶运动产生的垂直向下的冲击载荷为916 k N/m,对采场支架及巷道载荷较明显。着重针对两个冲击危险区域进行钻屑法及电磁辐射法监测,证实工作面过断层及正常回采时均存在冲击危险,并采取卸压措施。实践表明:采取深孔爆破卸压措施后,煤粉量明显降低,聚集的弹性能得到释放,动载系数变小,大大减小了冲击危险,保证了安全生产。In order to solve hazard of rockburst caused by complicated conditions of No. 3 coal seam in the certain mine, considering conditions of No. 3 coal seam and small susceptibility to rockburst of its roof, on the basis of comprehensive analysis of roof strata structure the mechanical model of basic roof during the first loading was es- tablished to qualitatively analyze rockburst risk. Vertical impact loading on the basic roof during the first loading is 916 kN/m, which has a significant influence on support and roadway. Two rockburst hazard areas were em- phatically monitored by using the method of drilling cuttings and the electromagnetic radiation. It was proved that there is a risk of rockburst when the working face crossing faults and normal mining, and the pressure relief measures were taken. The practice showed that after the deep hole blasting, the coal powder is obviously re- duced, the accumulation of elastic energy is released, and the dynamic load coefficient becomes small, which greatly reduces the risk of rockburst, ensuring safety in production.

关 键 词：冲击地压 冲击载荷 危险区域 应力集中 动载系数 

分 类 号：TD324[矿业工程—矿井建设]