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苏联黑色冶金原料基地主要是设计开采深度达500～700m厚度不等的急倾斜铁矿床。它们的生产特点是:开采工程不断的降深,并将剥离物运送到外部排土场。深露天矿开采经验证明,在上部区通常采用铁路运
The main base of the Soviet Union’s black metallurgical raw materials is the design and mining of steeply-inclined iron deposits ranging in thickness from 500 to 700 m. Their production features are: continuous decline of mining works, and delivery of exfoliation to external dumps. Deep open pit mining experience shows that in the upper area is usually used by rail transport