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查波罗热铁矿公司正在480～560和560～640米阶段进行开拓和采准。这两个阶段的开采特点是,要在400～480米阶段的矿房底柱下部进行采矿和在此阶段的充填体中掘进水平巷道。在实际应用中,矿房底柱的回采难度较
Chapiro hot iron ore company is 480 ~ 560 and 560 ~ 640 meters stage of development and mining approval. The two phases are characterized by mining at the bottom of the mine floor pillar at 400 to 480 meters and tunneling of horizontal tunnels at this stage of filling. In practical application, it is more difficult to mine the bottom pillar of the mine house