苏联在现有矿区开采方面,更强调采矿技术的改进,而不是着眼于加强勘探、开采新矿区。克里沃伊罗格北部矿床,除有一些分散的贵金属矿脉外,还有富含铁的石英岩。无论含铁量的多少,所有石英岩均用矿块崩落法开采,并优先考虑开采贵金属矿石,为了使损失率最小,用自硬性充填科充填采空 In the area of ​​existing mining, the Soviet Union places more emphasis on the improvement of mining technology rather than focusing on exploration and new mining. In addition to some scattered precious metal veins, there are iron-rich quartzites in the northern Creweiluoger deposit. Regardless of the amount of iron content, all quartzite is mined by ore-block caving, with priority given to the exploitation of precious metal ores. In order to minimize the loss,