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不久前,由中国地质调查局勘探技术研究所(勘探所)研发试制的3 500m钻探装备(YDX-6型)在山东招远阜山镇牛草涧金矿完成一口终孔直径122mm,孔深691.2m的地质勘查级大口径主井的先导孔,终孔孔斜为0.6°,获得甲方的高度赞誉。该钻机从2015年8月28日开钻到11月11日终孔,钻进时间558.5h,台月效率491.27m。3 500m钻探装备是我国自主研发的深部矿产
Not long ago, the 3 500 m drilling rig (YDX-6 type) developed by the China Institute of Geological Survey Exploration Technology Institute (Exploration Bureau) completed a final hole diameter of 122 mm and a hole depth of 691.2 at Niucaojian Gold Mine, Fushan Town, Zhaoyuan, Shandong Province m of the geological prospecting stage pilot hole diameter hole, the final hole inclination of 0.6 °, access to Party A’s high praise. The rig was drilled from August 28, 2015 to the final hole on November 11, with a drilling time of 558.5 hours and a monthly efficiency of 491.27 meters. 3 500m drilling equipment is our own research and development of deep mineral