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1979年之前,苏联的马尔干涅茨采选公司各矿井一般用窄独头进路回采锰矿石回采机械采用型联合采矿机。掌子面年平均回采量为9.2万t,掌子面工人劳动生产率为20t/班,采区成本为3.6卢布/t。
Prior to 1979, the coal mines of the Moganganz mining and mining company in the Soviet Union generally used a narrow single-headed approach to mining manganese ore recovery machinery using a type of integrated mining machine. The average extraction volume of the face is 92,000 t and that of the face workers is 20 t / class. The cost of the mining area is 3.6 rubles / t.