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矿山工程急剧降深是现阶段矿床露天开采发展的一个特点,近年来露天铁矿的深度增加了100～120m,目前达到200～320m,在最近的将来要达到350～400m。大部分铁矿石将是从最终开采深度为500～750m 的大型露天矿开采出来的。深露天矿采剥工程发展的特点是矿山技术条件日趋复杂。而且同有效作业区缩小、矿石区开采工程急剧降深、备采矿量减少、工作平台变窄和矿岩运距增加、采矿运输设备生产效率下降等有关。
The sharp decline of the mine project is a feature of the open-pit mining development at this stage. The depth of open-pit iron ore has been increased by 100-120 m in recent years, reaching 200-320 m at present and 350-400 m in the near future. Most of the iron ore will be mined from large-scale open-pit mines with a final mining depth of 500-750 m. Deep open pit mining stripping project development is characterized by increasingly complex technical conditions of the mine. In addition, with the reduction of effective work area, the mining area in the ore area has been drastically deepened, the reserve of mining equipment has been reduced, the work platform has been narrowed, the ore-ore rock distance has been increased, and the production efficiency of mining and transportation equipment has been reduced.