College of Safety Science and Engineering,Henan Polytechnic University Henan Administration of Coal Mine Safety
School of Civil and Environmental Engineering,University of Science and Technology Bejing

为解决开切眼附近冲击地压事故频发的问题,采用力学理论计算和现场测试的方法,分析了开切眼附近发生冲击地压的机理。研究结果表明:开采深度、采空区应力转移和断层残余应力是诱发开切眼附近冲击地压的主要因素。开切眼附近巷道冲击破坏类型分为高压应力差导致的剪切失稳和高拉剪应力导致的结构失稳。采用半煤岩巷或全岩巷,避免高压应力差导致剪切失稳型冲击;在开切眼及附近巷道两帮实施大直径深孔卸压,将底板的屈曲性破坏转化成缓慢弯曲变形,避免发生高拉剪应力导致结构失稳型冲击。

In order to solve the problem of frequent rock burst hazards near open-off cut,the mechanism of rock burst near open-off cut were theretically studied and surveyed in site. The results showed that mining depth,goaf stress transfer and fault residual stress were the major factors induced rock burst near open-off cut. The roadw ay near open-off cut rock burst types were classified into shear instability induced by high stress difference and structural instability induced by high shear stress. The mixe d coal-rock roadway or whole rock roadway were proposed,to avoid shear instability induced by high stress. The conduct pressure-relieving boreholes in open-off cut and n ear roadway sides,the floor of the buckling failure was changed into slowly bending deformation,so the occurrence of structural instability induced by high shear stress coul d be avoided.