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一、矿山概况石人沟铁矿是一个年产铁矿石150万吨的中型露天矿山。矿床属于鞍山式沉积变质贫铁矿床。全矿区有五条脉状矿体,主矿体走向南北,成似层状和扁豆状,倾角50～70°,厚10～12米,最大厚度60米。露天境界内圈定工业储量2685万吨,远景储量194万吨,共计2879万吨,岩石4841万米~3。岩石比重2.8(吨/米~3),硬度系数f=6～10,矿石比重3.4(吨/米~3),硬度系数f=10～12,地质品位32.11％。露天采场是一个近似南北方向的狭长形,南北长2400余米,东西宽250米,划分为三个采区。采场周围设置有五个排土场,总平面示意如图1。矿山于1975年投产,到1981年底已采矿石700万吨,剥岩1460万米~3,三个采区的基
First, the mining profile Shirengou iron ore is an annual output of 1.5 million tons of iron ore medium-sized open pit mine. The deposit belongs to the Anshan-type sedimentary metamorphism and iron ore deposit. The whole mining area has five vein-shaped ore body, the main ore body goes north and south, resembling layered and lentil, dip 50 ~ 70 °, thickness 10 ~ 12 meters, the maximum thickness of 60 meters. Open-boundary realm of industrial delineation of 26.85 million tons, long-term reserves of 1.94 million tons, a total of 28.79 million tons, 48.41 million meters rock ~ 3. Rock weight 2.8 (t / m ~ 3), hardness coefficient f = 6 ~ 10, ore specific gravity 3.4 (t / m ~ 3), hardness coefficient f = 10 ~ 12, geological grade 32.11%. Open pit is an approximate north-south long narrow shape, 2400 meters long from north to south, east-west width of 250 meters, is divided into three mining area. Set up around the stope with five dumps, the general plan shown in Figure 1. The mine was put into operation in 1975. By the end of 1981, 7 million tons of ore had been mined and 14.6 million m 3 had been stripped of rocks. The bases of the three mining areas