关键词: 水力压裂法, 临空动压, 超前支护, 工业性试验

Abstract: In order to solve the problem of serious roadway deformation and large amount of advanced maintenance in Ganhe coal mine 2-2092 mining roadway near the goaf, hydraulic fracturing roof cutting technology is used to weaken the integrity and stability of rock strata, reduce the high concentrated stress, so as to make the roadway in the low stress area. According to the actual conditions of 2-209 working face, the relevant parameters of hydraulic fracturing are designed, and the industrial test is carried out. The comparative analysis of monitoring data shows that the floor heave, roof subsidence and two sidewall displacement of 2-2092 roadway after hydraulic fracturing are greatly reduced, the influence of roadway deformation on driving and mining is reduced, and the support cost is saved.