关键词: 切顶卸压, 沿空留巷, 聚能爆破, 110工法

Abstract: Shaped blasting plays an important role in roof cutting and pressure relief along goaf retaining roadway. In order to explore reasonable blasting parameters of 110 mining methods and achieve the goal of successful and safe retaining roadway, taking the medium-thick seam 12605 working face of Guandi Coal Mine as the research background, three different charging structures were compared and analyzed by means of theoretical analysis and field research. The test blasting effect under the condition. The results show that under the condition of 7 m blasting hole depth and 500 mm blasting hole spacing, 4+3+2+1 charge from the top of hole to the bottom of hole destroys the roof seriously, and 3+2+2+1 charge slitting effect is poor. With the 3+3+2+1 charging method, the cracks in the blasting hole develop obviously, and the crack rate reaches 87%. Satisfying the design requirements of retaining roadway, the field application effect is good.