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波尔塔夫斯克采选公司露天矿开采含铁石英岩矿床,富矿的铁品位和磁铁矿品位平均为35.2％和27.2～28.5％;贫矿分别为26.9～29.1％和17.7～18.5％。在露天矿的设计边境内,初始的开拓
The ore-bearing quartzite deposit is exploited in the open pit mine of the Polotask mining company. The average iron grade and magnetite grade of the rich ore are 35.2% and 27.2-28.5% respectively; the lean mines are 26.9-29.1% and 17.7-18.5% respectively. In the open mine design border, the initial development