基于采空区围岩大冒落动力冲击灾害研究  

Study on Dynamic Impact Disaster Based on the Great Caving of Surrounding Rock in Goaf

作　　者：董川龙 程虹铭[1] 

机构地区：[1]山西大同大学煤炭工程学院,山西大同市037000

出　　处：《矿业研究与开发》2016年第9期38-40,共3页Mining Research and Development

摘　　要：基于东升庙铅锌矿采矿实践活动,通过理论建模和数值求解,对2号巨型采空区围岩发生大冒落引起的动力冲击灾害进行了研究。研究结果表明:冒高12.8 m的围岩压缩采空区空气引起的极限波速为38 m/s,冲击波在巷道口的极限波速为523 m/s;冒落围岩以38 m/s的速度撞击矿柱引起矿柱内部的最大动应力为9.2 MPa,矿柱在围岩冒落体冲击载荷作用下将发生破坏。Based on the mining activities of Dongshengmiao lead-zinc mine, the dynamic impact disaster caused by the great caving of surrounding rock in the NO.2 large goal was studied through theoretical modeling and numerical solution. The results showed that when the surrounding rock with ca- ving height of 12.8 m compressed the air in the goal, the limit wave velocity of shock wave would be 38 m/s firstly, and then reached to 523 m/s in the entrance of roadway. The falling rock impacting on the pillar at the speed of 38 m/s could cause the maximum dynamic stress of 9.2 MPa and the pillar would be destroyed under the rock burst.

关 键 词：采空区 顶板冒落 冲击波 冲击地压 

分 类 号：TD324.1[矿业工程—矿井建设]