苏联目前每年用露天法采掘的铁矿石为85％,露天开采方法发展的特点是增加露天矿的深度、矿石产量和岩石剥离量。例如,1979年在200米和超过200米深度的露天铁矿中采出的矿石占矿石总量的53％,露天矿平均年产矿石1170万吨,岩石3500万吨。至1985年,在这些露天矿中将能采出57％的矿 The Soviet Union currently mines about 85% of its open-pit iron ore each year. The development of the open-pit mining method is characterized by increased depth of open-pit mines, ore production and rock stripping. In 1979, for example, ore mined in open-pit iron mines at depths of 200 meters and over 200 meters accounted for 53% of the total ore. In opencast mines, the average annual output of ore was 11.7 million tons and 35 million tons of rock. By 1985, 57% of the mines will be mined in these open pit mines