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金山店矿区大部钻孔都要遇到1～2层粉状铁矿、浸染状(蜂窝状)和含铁夕卡岩等难采地层.这些地层有以下几种情况:①极松散的富集粉矿,粒径0.5～1毫米,胶结性差,易被冲洗液冲蚀而发生塌孔埋钻事故;②含泥质的绿泥石化夕卡岩,颗粒极细,有粘结性,见水膨胀,易缩径糊钻;③块状、粉状交杂在一起,颗粒大小不一,可钻性8～6级,极易碰坏合金片并造成矿心互相磨损,严重影响钻进工作.本队推广小口径金刚石钻进以来,为解决上述问题,我们曾设计使用过单管喷反、双管喷反、单动双管、双动双管、隔水侧喷、底喷等多种钻
Most of the Jinshandian mine borehole should encounter 1 ~ 2 layers of powdery iron ore, disseminated (honeycomb) and iron-bearing skarn difficult recoverable stratum, etc. These strata have the following conditions: ① very loose rich Set of powder ore, particle size of 0.5 to 1 mm, poor cementing, easy flushing fluid erosion and collapse borehole burial accident occurred; ② muddy chloritized skarn, fine particles, with adhesion, see Water swelling, easy to shrink paste paste; ③ lumps, powder mixed together, different particle sizes, drillability of 8 to 6, easily damaged alloy sheet and cause the core wear each other, seriously affecting the drilling Work to promote the team to promote small diameter diamond drilling, in order to solve the above problems, we have designed the use of single tube spray inverse, double spray, double action, double action double pipe, water side spray, bottom spray, etc. A variety of drilling