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我队在某铜矿区开动五台金刚石千米钻机，矿区除第四系复盖层外，主要岩石有变质沉凝炭岩、千枚岩、凝灰质千枚岩，以及古生代侵入岩变质细粒闪长岩和燕山期花岗闪长斑岩。岩石可钻性一般六至八级，部分九级，磨擦性较强，硬合金无法钻进钻孔设计孔深大多为千米深孔。过去使用大口径施工，由于孔斜严重，深部取心困难，深孔台月效率仅一百五十米左右，还有部分钻孔因地层复杂而达不到地质设计要求，始终未能打出千米深孔。使用的钻机为无锡金刚石千米钻机和本省研制的小口径转盘钻机，水泵为无锡探矿厂或本队制造的WX200/40型水泵。从七六年五月到七八年九月底，全矿区竣工的小口径钻孔平均孔深为931.40米。去年施工完工的十一个钻孔，超过千米的深孔就有七个，最深的达1023.28米（见表1）。
Our team started five diamond drill rigs in a copper mining area. Except for the Quaternary overburden, the main rocks are metamorphic sedimentary carbonaceous rocks, phyllites, tuffaceous phyllites, and Paleozoic intrusive metamorphic rocks Granodiorite and Yanshanian granodiorite porphyry. Rock drillability is generally six to eight, some nine, strong abrasion resistance, hard alloy can not drill into the hole design Most of the deep hole for kilometers. In the past, large-diameter construction was used. Due to the serious hole rapids and deep coring difficulties, the efficiency of deep hole taiyue was only about 150 meters. In addition, some of the boreholes did not meet the geological design requirements due to the complex strata. Deep hole of rice. The drilling rigs used were Wuxi Diamond Kiln Drilling Rig and the small caliber rotary drilling rig developed by our province. The pump was WX200 / 40 type pump manufactured by Wuxi Prospecting Factory or our team. From May 1976 to the end of September or the end of September or Sept 1978, the average hole depth of small bore holes completed in the whole mine area was 931.40 meters. Eleven drilled holes completed last year, with more than seven thousand deep holes and the deepest 1023.28 meters (Table 1).