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我队试验小口径金刚石钻进最初仅开动两台钻机,全孔均用金刚石钻进,虽然效率高,质量好,但成本比钢粒钻进稍高,且国家供应金刚石钻头有限.后来我队钻探工人根据实践经验,调查了矿区岩层情况,提出了软岩层用合金、硬岩层用金刚石分层钻进的建议.通过试验,终于获得成功.1973年,全队采用分层钻进方法,在国家供应三台钻机金刚石钻头用量的情况下,小口径钻机开到10台.1974～1975年又有增加,最多开到14台,占全队开动钻机台数的78%.1973～1976年共完工小口径钻孔160多个,除个别钻孔外,都是用金刚石与合金钻头施工的,完成工作量114145米,合
Our team experimented with small diameter diamond drilling initially only started two rigs, all holes are diamond drilling, although the efficiency and good quality, but the cost of drilling slightly higher than the grain, and the national supply of diamond bits limited. Later, my team Based on practical experience, the drillers investigated the conditions of the rock strata in the mining area and put forward the suggestion that the soft rock strata should be drilled with the alloy and the hard rock stratified by diamond. Finally, the experiment was finally successful. In 1973, the team adopted the stratified drilling method The national supply of three diamond drill bits, the small-diameter drill open to 10. From 1974 to 1975 has increased, up to 14 to open, accounting for 78% of the team to start drilling rig number of 1973 ~ 1976 were completed Small diameter drilling more than 160, except for individual drilling, are used diamond and alloy drill construction, the completion of 114,145 meters of work, and