在有底部结构的崩落法中,出矿漏斗的施工,一般均由耙矿巷道向上掘指状天井至切割水平,而后再由切割水平打下向扩喇叭口,这种工艺比较麻烦,且由于受拉底巷道断面的限制,不能保证喇叭口达到所需的受矿面积。我们在金山店铁矿的矿块崩落法试验中,采用一次成井扩漏斗爆破技术,取得了成功。 In the structure with the bottom of the caving method, the construction of the funnel out of mining, mining roadway generally up to dig the finger-shaped patio to the cutting level, and then laid by the cutting level to expand the bell, this process is too much trouble, and because of Bottom of the tunnel section of the limit, can not guarantee the bell mouth to reach the desired by the mining area. At the Jinshandian Iron Ore Block Caving Test, we succeeded in using a well-forming expansion funnel blasting technology.