In order to solve the problem of serious deformation of roadway driving along goaf in Jiulishan Coal Mine according to the serious mining-excavation replacement, the engineering technology of deep borehole blasting for roof cutting and pressure relief is applied in transportation roadway of No. 15071 mining face. Based on the methods of theoretical analysis,field experiment and mine pressure observation,it is found that, deep borehole blasting for roof cutting and pressure relief can control serious deforma...