CHINA MINE ENGINEERING

By analyzing the problems in the underground drift advancement process in Tonglushan Mine, comparison is made for the cut processes of medium-length hole, the reamer bit for drift advancement is introduced and made, the distribution of cut holes for drift advancement is optimized, and the site application test is conducted, so that the efficiency of the underground drift advancement in Tonglushan Mine is improved by 15%, and the material cost for advancement is reduced by 7%; in addition, the blasting effect of advancement construction is effectively improved and the safety and efficiency of site construction is improved.