Abstract:
Based on analysis of technical advantages of gob-side entry retaining by cutting roof to release pressure, combined with geological and mining technical conditions of 19022 working face of Shiquan Coal Mine, the scheme of gob-side entry retaining by cutting roof to release pressure for Shiquan Coal Mine was proposed: high-strength anchor with single hydraulic props were selected for advanced reinforcement support of mining roadway; pre-split blasting was carried out on the roof of roadway from goaf to advanced support section to form fracture top cutting line during pressure relief; reinforcement support in the back of the working face adopted the form of sluice column + single hydraulic props lifting shed + hydraulic lifting shed. The results of mine pressure monitoring show that the average subsidence of roadway roof is 95 mm, and the average displacement of the two gangs is 225 mm, which is in line with the deformation requirements of the roadway section;the average support resistance of the roadway supports is 33 MPa, which meets the requirements of roadway support strength.