淮南矿业集团谢一矿-320～-660m运输下山,所处层位为硅质胶结细砂岩,硬度大,且该巷道按22°下坡施工,掘进过程中,根据实际情况,选择爆破工艺,将浅孔爆破改变为中深孔爆破;由正向起爆方式改为反向起爆,并且采用新设备排矸(大功率耙矸机+防滑皮带机+矸石仓)。实验证明:该巷道月进尺从以前的40～45m/月,提高到85～90m/月,经济效益明显提高,实现了安全高效掘进。 Huainan Mining Group -320 ~ -660m transport -320 ~ -660m down the mountain, the layer is siliceous cemented fine sandstone, hardness, and the roadway by 22 ° downhill construction, excavation process, according to the actual situation, select the blasting process, The shallow hole blasting changed to medium-deep hole blasting; from positive blasting method to reverse blasting, and the new equipment wastes (high-power rake + non-slip belt machine + waste rock bin). Experiments show that: the monthly footage of the roadway from the previous 40 ~ 45m / month, raised to 85 ~ 90m / month, the economic benefits improved significantly, to achieve safe and efficient excavation.