克里沃罗格矿区是苏联黑色冶金工业的主要原料基地。这里有5个世界最大的采选公司,每年开采和处理约5亿吨矿岩。然而随着开采深度的增大,采选公司的技术经济指标不断恶化,将来的产量可能急剧下降,基建投资要大量增加,并且采矿工作会破坏肥沃的土地。露天开采中运输问题特别重要。如果地 The Krivoy Rug mine is the main raw material base for the Soviet Union’s black metallurgical industry. There are five of the world’s largest mining companies, mining and processing each year about 500 million tons of ore. However, as mining depth increases, the technical and economic indicators of mining companies continue to deteriorate, their output may drop sharply in the future, infrastructure investment will increase substantially, and mining will destroy fertile land. Transportation problems in open pit mining are particularly important. If the ground