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现在我们朝鲜民主主义人民共和国国民经济所需的工业原料几乎全部是国内生产的。我国的铁矿和一些非金属矿,大部分采用露天开采。为了缩短建设周期,基建剥离经常采用一次300～500吨炸药的大爆破。为了提高露天矿的生产能力,采用了斜孔钻机,装载废石采用铲斗容积为1-10米~3的挖掘机。运输采用装载能力为10～45吨的卡车和皮带运输机。有色金属矿和贵金属矿大部分采用地下开采。厚度在10米到几百米的矿脉的比例,今后将增加到60～70％。技术人员和科学家们,通过研究采用新的采矿方法,成功地使厚矿体回采率达80％,薄矿脉回采
Now almost all of the industrial raw materials we need for the national economy of the Democratic People’s Republic of Korea are domestically produced. Most of China’s iron ore and some non-metallic ores use open-pit mining. In order to shorten the construction period, stripping of infrastructure often uses a large blast of 300 to 500 tons of explosives. In order to improve the production capacity of open-pit mines, the use of inclined hole drilling rig, loading waste rock bucket diameter bucket with 1-10 m ~ 3 excavator. Transport trucks and belt conveyors with a loading capacity of 10 to 45 tons. Most non-ferrous metal ore and precious metal mines use underground mining. The proportion of veins with a thickness of 10 to a few hundred meters will increase from 60 to 70% in the future. Technicians and scientists successfully adopted the new mining method through research to make the recovery rate of thick ore body reach 80%, the recovery of thin ore vein