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首钢地质勘探公司承包的水厂大型露采铁矿边坡工程的岩心定向钻探任务,共设计有15个钻孔,总钻探量3055米,其中岩心定向钻孔11个(钻进量2525米)。全部工程计划在1987～1988年完成,承包总金额为98.52万元。该项工程由长沙矿冶研究院设计,发包单位为首钢矿山公司。施工所用钻机为YL—6型钻机,采用的岩心定向钻具是YCD型75毫米口径多点随钻岩心定向钻具。该钻具是在冶金部地质局的领导组织下,由《地质与勘探》编辑部负责与东北冶金地质勘探公司共同设计,由东北冶金地质勘探公司机修厂进行试制,并先后在小孤山矿区和北台矿区进行过井下试验。本次施工,由东北冶金地质勘探公司负责技术指导和服务。在首钢矿山公司和长沙矿冶研究院的密切配合下,于3～4月份已顺利钻完两个岩心定向钻孔。
A total of 15 boreholes have been designed for a total of 1555 meters of drilled holes, of which 11 are directional drilling holes (2525 meters of drilling volume) for directional drilling of large-scale open-pit iron ore slope contracted by Shougang Geological Exploration Company. . All projects completed in 1987 ~ 1988, the total contract amount of 985200 yuan. The project was designed by the Changsha Institute of Mining and Metallurgy, contracting unit Shougang Mining Company. Construction rig used for the YL-6-type drilling rig, the core directional drilling tools used is YCD 75 mm diameter multi-point while drilling core directional drilling. The drilling tool is under the leadership of the Bureau of Metallurgy and Geology Bureau and is jointly designed by the editorial department of Geology and Exploration and Northeast Metallurgical Geological Prospecting Company. It is trial-manufactured by the Northeast Metallurgical Geological Prospecting Company’s mechanical repair factory and successively tested in Xiaogushan Mining Area And North Taiwan mine conducted underground tests. The construction, by the Northeast Metallurgical Geological Exploration Company is responsible for technical guidance and services. In close cooperation with Shougang Mining Company and Changsha Mining and Metallurgy Research Institute, two core directional drilling holes have been drilled smoothly from March to April.