从长远观点看,铁矿露天开采所占的比重将是很高的,并且变化不大。它在生产总量中占83～86％。作为露天开采的战略基础,在极重要的铁矿区,生产将进一步集中,并将建成一些大型联合露天矿。最普遍采用的仍然是间断工艺。这项工艺经过改进之后,将用于开拓深部水平,从而消除或缩 In the long run, the proportion of open-pit iron mining will be high and will not change much. It accounts for 83-86% of the total production. As a strategic foundation for open pit mining, production will be further concentrated in the most important iron ore mines and large open-air mines will be built. The most commonly used is still intermittent process. After the process is improved, it will be used to develop deep levels to eliminate or reduce