克里沃罗格铁矿区的一些矿床,同时采用露天方法和地下方法进行开采。在地下开采中,大量崩落矿石和围岩是最有效的回采工艺,但是这种方法只能在远距离生产露天矿边帮处或设计规定先用露天方法而后用地下方法顺序开采时应用。“五一”磁铁石英岩矿床位于克里沃罗格铁矿区北部,该矿床同克里沃罗格矿区其它铁矿床的区别,是它赋存于挠曲褶皱中,从而具有复杂的块状结构,并且构造裂缝颇为发育。每个构造矿块都具有独立的埋藏要 Some of the Krivoyargo iron ore deposits are mined simultaneously using both open-pit and underground methods. In underground mining, large-scale caving and surrounding rock are the most effective recovery processes, but this method can only be used when long-distance production of open-pit mines or designs require the first open-pit and then underground methods. The “May Day” magnetite quartz deposit, located in the northern part of the Krivoyargue iron deposit, is distinguished from other iron deposits in the Kliwallog mining area in that it occurs in flexural folds and thus has complex blocks Like structure, and the structural cracks are quite developed. Each constructed nugget has an independent burial requirement