关键词: 深孔爆破, 切顶卸压, 沿空掘巷, 围岩控制

Abstract: In order to solve the problem of serious deformation of roadway driving along goaf in Jiulishan coal Mine according to very tense mining-excavation replacement, the engineering technology of deep borehole blasting for roof cutting and pressure relief is applied in haulage gateway of No. 15071 mining face. Based on the methods of theoretical analysis, field experiment and mine pressure observation, deep borehole blasting for roof cutting and pressure relief can control serious deformation of roadway driving along goaf is founded out, and the parameters and process of blasting and bursting charge are researched. The conclusions show that deep borehole blasting for roof cutting in haulage gateway of No. 15071 mining face has played a good pressure relief role to the roadway driving along goaf in No. 15091 mining face, and the roadway confining pressure has decreased, and serious deformation of roadway has been effectively controlled, and roadway support quality has been improved compared to roadway without roof cutting.