急倾斜立槽煤掘进工作面冲击地压的分析

An Analytical Study on the Rock Burst of the Heading Face of the Sublevel Caving of Steep Vertical Coal Seam

根据大洪沟煤矿近2年来发生的强矿压显现的特征,经论证将该强矿压认定为冲击地压。针对大洪沟煤矿急倾斜立槽煤水平分段布置工作面的特点,通过分析采掘工作面发生冲击地压的现状、条件、环境、特点,研究在这种条件下发生冲击地压的机理、防治措施。结论表明,大洪沟煤矿冲击地压是水平应力、垂直应力和上方采动应力叠加引起的,采取顶底板卸压爆破、煤层注水、底板开槽卸压、避免回采和掘进交叉等措施防治掘进工作面冲击地压是有效的。

Based on the occurrence of high rock pressure in Dahonggou mine in the recent two years,through demonstration the high rock pressure has been identified as rock burst.According to the characteristics of the allocation of mining faces on the horizontal sublevel of Dahonggou coal mine＇s steep vertical coal seam,this essay conducts a study on the mechanism of rock burst occurrence and the measures for its prevention,by analyzing the current status,conditions,environment and characteristics of the rock burst occurring on the mining face.It reaches a conclusion that Dahonggou mine＇s rock burst is the result of horizontal stress,vertical stress and the top mining-induced stress.It can be effectively prevented by a variety of methods such as relieving shot on the roof and floor,coal seam infusion,floor relieving slotting,recovery prevention and cross-heading.