关键词: 巷道掘进, 爆破参数优化, 掘进效率

Abstract: Combined with the geological conditions and production practice of Xingshan Iron Mine， the influence of each procedure on the tunneling speed in the tunnel excavation process is analyzed，and tar⁃ geted optimization measures are taken to improve the tunneling efficiency.In view of the problem of high rock hardness，the distance between the center hole and the undercut hole was reduced from 200 mm to 180 mm，and the undercut effect was significantly improved. Aiming at the problem of low cycle footage ef⁃ ficiency，through scientific calculation，66 blastholes were optimized to 55，which reduced the unit con⁃ sumption of explosives from 2.65 kg/m³ to 2.35 kg/m³，and the tunneling efficiency was significantly im⁃ proved.

Key words: roadway excavation, blasting parameter optimization, tunneling efficiency