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1959—1963年苏联井建施工部门在金属和非金属矿山开凿竖井井筒的总长达40公里。БЧ型和KC-3型普通抓岩机是机械化装岩的主要工具,但这种开凿井筒的技术-经济指标很低。在此五年内,月平均成井速度不超过28米,比煤矿掘进速度大约低20—25%。某些井建施工部门的掘进工效为0.2—0.7米~3成井/班,而同期煤矿部门却达到1.0米~3成井/
In 1959-1963, the Soviet Union’s well construction sector dug 40,000 kilos of shaft shafts at metal and non-metal mines. The БЧ and KC-3 common grab grabs are the main tools for mechanized rock loading, but the technical-economic indicators of such drilling are very low. In this five-year period, the monthly average well completion rate does not exceed 28 meters, about 20-25% lower than the speed of coal mining. Some well construction work sector tunneling efficiency of 0.2-0.7 m ~ 3 into the well / class, while the coal sector has reached the same period 1.0 m ~ 3 into the well /