铜街-曼家寨矿段露天采场具有上部剥离岩石量多，采出矿石量少，下部则反之的矿岩分布特点，设计以1080 m为分界将露天采场划分为Ⅰ、Ⅱ采区，结合Ⅰ、Ⅱ采区不同采剥工艺、台阶参数、穿孔设备、铲装设备、运输设备及不同的爆破孔网参数、运输道路参数、贫损指标等，按分区用多种方法进行计算和论证，使生产规模论证更科学、更具可操作性。%The open pit at Tongjie -Manjiazai ore-block is characterized by ore -bearing rock distribution of more stripping rock volume and fewer mined ore on upper part , but on the contrary at lower part .In the design , the open pit is divided into I and Ⅱ mining areas at 1 080 m as boundary .Combined the different stripping process , step parameters, perforation equipment ,shovel loading equipment , transportation equipment and differ-ent blasting holes network and road transport parameters , dilution loss index etc .for I andⅡmining areas , cal-culation and verification were carried through by various methods according to subarea so that made the verifica -tion of production scale more scientific and operable .
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