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一、概况为加速矿山建设,冶金部于1975年从美国B—E公司引进了一批牙轮钻机,装备冶金矿山。我矿引进60—R三台,45—R四台。这些钻机除留一台60—R钻机作图纸测绘用外,其余六台分别于1975年5月～1979年3月先后投产使用。到1980年上半年平均每台运行了10175小时,钻孔达112569米。其中投产最早的1~#(60—R)钻机已运行了17818小时,钻孔达161488米,爆破量达2035吨;4~#(45—R)
I. Overview To speed up the construction of mines, the Ministry of Metallurgy introduced a number of cone drill rigs from the United States B-E Company in 1975 to equip the metallurgical mines. I mine the introduction of 60-R three, 45-R four. In addition to leaving a 60-R drilling rig drawings for mapping purposes, the remaining six were put into operation in May 1975 ~ March 1979, respectively. By the first half of 1980 an average of 10175 hours of operation was carried out and boreings amounted to 112,569 meters. Among them, the earliest 1 ~ # (60-R) drilling rig put into operation has been running for 17818 hours, with a drilling volume of 161,488 meters and a blasting volume of 2,035 tons; 4 ~ # (45-R)