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我局一○四队二号机，十多年来一直在丹寨汞矿带施工。该矿区地质构造复杂，主要为寒武系碳酸盐地层，岩层倾角大，断层带比较破碎，因此，给钻探施工带来了一定的困难。以往一直采用大口径钻进，尽管采取了相应的技术措施，但仍然是效率低、质量差、成本高。为了扭转钻探生产的落后面貌，适应四化的需要，78年该队党委决定在二号机试验推广金刚石小口径钻进。推广前，他们曾派技术员、机班长及有关人员到湖南402队等地学习，回队后，立即组成以管生产的队长和探矿科技术人员为主的推广试验小组。试验推广中，由于党委的重视、各职能科室的密
I 104 sets of second machine, more than 10 years has been Danzhai mercury mining construction. The complex geological structure of the mining area is mainly composed of Cambrian carbonate strata. The dip angle of the strata is relatively large and the fault zone is relatively fragmented. Therefore, some difficulties have been brought to the drilling construction. In the past, large diameter drilling has been used. Despite the corresponding technical measures, it is still inefficient, of poor quality and of high cost. In order to reverse the backwardness of drilling production and to meet the needs of the four modernizations, the party committee of the party decided in 1978 to promote the drilling of small diameter diamonds on the second machine. Prior to the promotion, they had sent technicians, flight squad leaders and relevant personnel to Hunan 402 teams and other places to learn. After returning to the team, they immediately formed a pilot team which mainly consisted of team leaders and prospecting and technical personnel. Experimental promotion, due to the importance of party committees, the various departments of the secret