Abstract: In order to reduce the safety problem of patio construction and improve the intrinsic safety and construction efficiency，through the demonstration and comparison of two schemes of parallel empty hole cutting method and VCR funnel cutting method，the application scheme of deep hole once blasting well completion technology is formulated. The scheme comprehensively utilizes the advantages of the two cutting methods，and the construction is simpler and more efficient. The field industrial test was carried out in the stope cutting patio of Jiulongnao mining area of Jiangxi Dangping Tungsten Industry Co.，Ltd. The test results show that the deep hole one-time blasting technology can achieve the purpose of safety，high ef⁃ ficiency and low cost in patio excavation，and the economic benefits are considerable，which can be popu⁃ larized and applied in underground metal mines.

Key words: underground mine, one blasting of deep hole, patio excavation