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我局推广金刚石绳索取芯钻进技术是逐年发展扩大的.自1978年末开始试验到1981年最多开到十二台钻机;由一个队推广到十一个队.近四年来绳索取芯钻机完成工作量21981米,平均台月效率354米,比大口径钻孔(平均台月效率198米)提高79%;完成钻孔27个,其中优质钻孔24个,占88.8%,合格孔3个,占11.2%,消灭了三类孔和报废工作量.1980年全年平均每米成本86.55元,比大口径钻孔平均每米降低49.25元,比普通小口径钻孔每米降低40.4元.我局地质六
Our bureau’s promotion of diamond rope coring drilling technology has been expanded year by year since the test began in late 1978 up to a maximum of 12 rigs in 1981 and was extended to 11 teams by a team. The work load is 21981 meters, the average station efficiency is 354 meters, which is 79% higher than that of the large diameter borehole (average meter efficiency of 198 meters). There are 27 boreholes completed, of which 24 are high quality holes, accounting for 88.8% , Accounting for 11.2%, eliminating three types of holes and scrapping the workload in 1980. The average annual cost per meter was 86.55 yuan, 49.25 yuan lower than the average diameter of large-diameter boreholes, 40.4 yuan lower than that of ordinary small-diameter boreholes. I Bureau geological six