1987年4月30日到8月4日，我队在黄山铜镍矿区竣工的ZK122-4孔，设计孔深1500m，直孔；实际孔深1506.31m，终孔顶角2°05′（钻孔弯曲情况见表1），平均岩矿心采取率97.9％，其中矿心采取率98.26％，钻孔质量完全满足地质要求。该孔开动台月数3.11，台月效率484m，纯钻进时间率29.7％，平 From April 30 to August 4, 1987, ZK122-4 hole of our team completed in Huangshan copper-nickel mine was designed with a hole depth of 1500m and a straight hole; the actual hole depth is 1506.31m and the tip hole angle is 2 ° 05 ’ Hole bending conditions shown in Table 1), the average rock core take rate of 97.9%, of which the heart rate of 98.26%, drilling quality fully meet the geological requirements. The opening of the hole number of 3.11 Taiwan, Taiwan and Taiwan efficiency of 484m, pure drilling time rate of 29.7%, flat