在苏联,铁矿石主要以露天法从埋藏深度很大的急倾斜铁矿床中采得。因此,确定露天矿的极限深度是铁矿开采工业最重要最复杂的问题之一。现有露天矿的设计深度可望达500～700米。这么大深度是否有充分的依据?目前,约有20个大型露天矿的采深超过200米,生产的特殊困难已经出现,并且 In the Soviet Union, iron ore was mainly obtained from the steeply-buried iron deposits buried deeply in the open air. Therefore, determining the ultimate depth of open pit mines is one of the most important and complex issues in the iron ore mining industry. The design depth of the existing open pit mine is expected to reach 500 to 700 meters. At this depth, is there sufficient evidence? At present, about 20 large open pit mines are over 200 meters deep and special difficulties in production have emerged and