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为了开发萨尔拜露天矿的深部水平,哈萨克金属矿矿山建设局于1978年着手建设萨尔拜隧道。由±0水平到-80米水平带出口的第一期隧道工程应当于1984年交工。第一
In order to develop the deep level of the open pit mine in Saalbo, the Kazakhstan Metals Mine Construction Bureau began construction of the Saalby Tunnel in 1978. The first phase of tunneling with export levels from ± 0 to -80 meters should be handed over in 1984. the first