地下矿山工艺改革的主要方向之一是寻求工序少的工艺,以减少劳动量与工资。矿山中劳动强度大的工序是掘进垂直的放矿巷道。通常采用浅眼法和联合法掘出放矿天井,再扩成放矿漏斗。 采用浅眼法时先掘出直径1.2～1.5米的放矿天井,炮孔深1.5～2.0米,每个循环钻 One of the main directions of the technological reform of underground mines is to find a process with fewer processes to reduce the amount of labor and wages. The laborious process in the mine is tunneling the vertical mine roadway. Commonly used method of shallow eye and joint law excavated the mine shaft, and then expanded into the funnel. When using shallow-eyed method first digging diameter of 1.2 ~ 1.5 m of the ore mines, blast hole 1.5 to 2.0 meters deep, each cycle drilling