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西卡拉扎尔铁矿为倾斜和陡倾斜的矿体,厚约10—50米。对倾斜地段的矿体,采用阶段-矿房崩落系统进行地下开采。按采矿工艺,规定首先开采矿房的储量,尔后大量爆破顶柱、块段间矿柱、矿房间矿柱,同时崩落裸露的顶板岩石。矿柱崩落后,矿石呈非均匀层分布在放矿水平和无放矿口的块段倾斜部位上。通过放矿水平坑道可回收40—60%的崩落矿石,残留在块段底板上的矿石为损失量。该系统的总损失量为20—25%,而西卡拉扎尔矿井上部水平的损失量为矿柱储量的44.5%左右。而且业已付出开拓和崩矿费用的那些采落的矿石也被损失掉了,因此,提高
The West Carajar Iron Ore is a steep and steep orebody with a thickness of about 10-50 meters. On the inclined section of the ore body, the use of stage - mines caving system for underground mining. According to the mining process, the provisions of the first exploitation of the reserves of the mines, then a large number of blasting top pillars, block pillars, pillars ore mines, while roofing exposed bare rock. After the collapse of pillars, the ore is unevenly distributed in the ore level and non-ore mouth section of the inclined section. 40-60% of the caving ore can be recovered through tunneling at the level of ore leaching, and the amount of ore remaining on the floor of the block section is the amount of loss. The total loss of the system is 20-25%, while the upper level of the West Carazar mine is about 44.5% of the ore column reserves. And those plowed ore that has been paid for pioneering and disintegration costs have also been lost, and therefore, increased