论文部分内容阅读
石山金矿钻探施工存在一个突出的技术难题，就是取心困难，达不到地质要求。过去在该区使用大口径钻进，平均采取率不足61％；80年底，我队一机台在该区采用小口径金刚石钻进，施工的ZK1孔，孔深95.39米，90％工作量采取率低于规程要求，30余米无岩心，平均采取率31.9％，矿心采取率28％，地质不能利用。事故停待多，纯钻利用率仅14.1％，施工周期一个半月。1981年6月，我分队三号机在该区进行普查钻探。地质设计了四个85°斜孔，共700米工作量。要求岩心采取率不低于65％，不得有岩心为零的回次；矿
Rock Hill Gold Mine drilling there is a prominent technical problems, that is, coring difficulties, reach the geological requirements. In the past, large bore drilling in this area took less than 61% on average. At the end of 1980, a machine station of our team used small diameter diamond drilling in the area to construct ZK1 hole with a hole depth of 95.39 meters and a work load of 90% Rate lower than the rules, 30 meters without core, the average taken rate of 31.9%, 28% ore mining rate, geological can not be used. Parking and more accidents, pure diamond utilization rate of only 14.1%, the construction period of one and a half months. In June 1981, I unit No. 3 aircraft census drilling in the area. Geology designed four 85 ° inclined hole, a total of 700 meters of workload. Required to take core rate of not less than 65%, no core back to zero;