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昆阳磷矿是大型露天矿,矿体走向长,排土距离远,排土场容量小,尤其一采区为后期纵深开采、排土量大,又是重车上坡,排土成本较高。 1982、1983年试行采空区排土,仅二采区共排土约100万米~3,节约运量236.7万吨公里,节省运费83.579万元,而且减少了排土场占地及赔偿费用,还在采空区复田植树,进行了恢复生态平衡的研究,取得一些效果。
Kunyang Phosphate Rock is a large-scale open pit ore body that has a long ore body and a long distance of draining soil and a small dumping area. In particular, the first mining area is a deep-going mining at a later stage with a large amount of dumping and a heavy truck uphill. high. Trial excavation of mined-out area in 1982 and 1983, only the second mining area total drainage of about 1000000 m ~ 3, saving 2.367 million tons of traffic, saving 835,990 yuan freight, and reduce the dumping area and compensation costs, We also planted trees in the mined-out area and carried out researches on restoring the ecological balance and achieved some results.