向山硫铁矿的矿石松软,硬度系数黄铁矿f=2～4;铁矿f=4～6。几乎所有巷道都要支护。上下盘围岩也属于不稳—中等稳定岩石。 该矿已有40年开采历史。采矿方法沿用分层或分段崩落法,放矿天井沿穿脉巷道布置,间距为17～25米。天井都是布置在矿体内,工程量大,施工复杂。天井工程原来用木支护,人工掘进,作业条件差,支护也不能起到有效的作用,给生产带来许多困难。以后改为钢筋混凝土支护,虽然在支护效果上有所改善,但仍旧不理想,而且造价昂贵。69年试验成功吊罐掘进以 Soft ore to the mountain pyrite, hardness coefficient pyrite f = 2 ~ 4; iron ore f = 4 ~ 6. Almost all roadway to be supported. Wall rocks also belong to the unstable rock - medium stable rock. The mine has 40 years of mining history. Mining methods continue to use sub-level or subsidence caving method. The ore drains are arranged along the weeping lane and the spacing is 17-25 meters. Patio are arranged in the ore body, large amount of construction, construction complexity. Patio works originally used wood support, manual excavation, poor working conditions, support can not play an effective role, to produce many difficulties. Later changed to reinforced concrete support, although the support effect has been improved, but still not ideal, but also expensive. 69 years of successful trial of hanging cans