矿床露天开采方法是采矿工业大量开发自然资源的基本方向。露天开采有许多优点,首先是生产过程的机械化程度高,劳动安全条件好,但是无庸讳言,采矿工业的资源占用量也在稳步增长。其所以如此,是因为靠近地表的富矿已经采空,投入开采的贫矿越来越多。如果说1960年生产一吨商品铁矿需要开采1.3吨原矿的话,那么1980年就得开采2吨原矿。贫矿(含铁 Opencast mining method is the mining industry to develop a large number of natural resources in the basic direction. Open pit mining has many advantages, first of all, the mechanization of the production process is high, labor safety conditions are good, but it goes without saying that the resource occupation of the mining industry is also steadily increasing. This is the case because the rich ore near the surface has been mined out and more and more lean mines have been put into exploitation. If the production of one tonne of commodity iron ore in 1960 required the extraction of 1.3 tons of ore, then two tons of ore would have to be mined in 1980. Poor mine (iron