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我局从一九七五年开始推广小口径金刚石钻探，一九七六年逐步扩大使用，先后在七个大队、二十一个矿区，包括铜、钨、钼、锡、铅锌、煤、铁等矿种施工。四年来共完成钻孔144个，平均孔深634米，工作量共计91,273米。推广小口径钻探后对提高地质工作质量，加速重点矿区普查评价起到了积极作用。随着技术的进步，管理工作的加强，小口径钻探的各项经济技术指标也逐年稳步提高（见下表）。并有一些矿区的经济技术指标全面好于同矿区大口径钻探水平。全局广大职工都体会到了金刚石钻探的优越性，争上小口径的单位越来越多，持怀疑观望态度的逐渐减少。从大量实践中我们体会到，小口径钻探运用的好坏，很重要的一个因素就是管理工作能不能跟上去，总结我们四年来管理工作中成功的经验与失败的教训，体会较深的有以下四点。
Our bureau started to promote small-diameter diamond drilling from 1975 and gradually expanded its use in 1976. It has held seven batches and twenty mining areas including copper, tungsten, molybdenum, tin, lead, zinc, coal, Iron and other mining construction. In the past four years, a total of 144 boreholes were drilled, with an average hole depth of 634 meters and a total workload of 91,273 meters. After the promotion of small-diameter drilling, it has played a positive role in improving the quality of geological work and accelerating the census and evaluation of key mining areas. With the improvement of technology and management, the economic and technical indexes of small-diameter drilling have been steadily increasing year by year (see table below). And some of the economic and technical indicators of the mining area is better than the same area with large-diameter drilling. The majority of workers in the entire world have all realized the superiority of diamond drilling. More and more units are striving for small-caliber drilling, and the number of people with skepticism and wait-and-see attitude is gradually decreasing. From a great deal of practice, we realize that a very important factor in the use of small-caliber drilling is whether management can keep up with the lessons we have learned from successful experiences and failures in management over the past four years. Four o’clock.