当前,我国大冶、大孤山、眼前山、南山、白云鄂博东矿等大型露天铁矿已相继转入深凹开采,垂深有的已达100多米。预计到本世纪末,我国现有的10多个大型露天铁矿都将转入深凹开采。国内外的经验证明,随着露天开采深度、生产规模及剥采比的不断增加,铁路运输受 At present, large-scale open-pit iron mines such as Daye, Dagushan, Anqian Mountain, Nanshan and Baiyunebo have been transferred to deep-seated mines in succession, and some of them have reached more than 100 meters. It is estimated that by the end of this century, more than 10 large-scale open-pit iron mines in our country will be transferred to deep mining. Experiences both at home and abroad prove that with the increasing depth of open-pit mining, the scale of production and the stripping ratio, railway transportation is subject to