关键词: 钻孔爆破, 导硐, 大垂高, 煤仓

Abstract: At Songhe coal of the first mining area , for solve the coal bunker vertical height、the complexity coal and rock stratum construction、shorten the time limit for a project,by use the total station center finding、special support frame to steadiness drilling machine、drill PVC annular tubes、dynamite lead tunnelling、discharge waste rock and ventilate, improvement the construction technology,to prevent the coal rake and hole collapse, increase lead tunnelling powder charge and blasting effect, guarantee the construction quality, realize rapid construction, practice indicate,the dynamite lead tunnelling ues at complicated geological condition to solve the coal bunker vertical height is clear effect.