【摘要】 南芬露天矿坑底线已达到 346m水平 ,按矿山改建设计的要求 ,2 90平硐矿石运输系统应停运 ,启用新的运输系统 ,新系统每年将增加约 2千万元的运输费用。为降低矿石运输成本 ,对延长 2 90平硐服务年限的可行性进行了研究。研究内容包括地质调查、支护技术和露天开采综合技术等。研究结果表明 ,延长 2 90平硐服务年限是可行的更多还原

【Abstract】 The baseline of the pit bottom has reached 346m level in Nanfen Surface Mine. As required by the design of mine innovation, the ore haulage system at the 290 level adit should be decommissioned and a new transportation system should be installed. In that case, an addtional 20 million yuan transportation expense will be incurred anually. In order to cut transportation cost, a feasibility study is carried out with regard to prolonging the service life of the 290 level adit. Research projects include geological survey, support technology and surface mining. The research results show that it is feasible to extend the service life of the tunnel.更多还原