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我队的一号机台，使用φ56绳索取心钻具，在某地进行多金属普查钻探施工。地层多为片麻岩、爆破角砾岩。山下零线钻孔，在孔深50米处，有一涌水量为40升/分的承压水涌出（干旱季节）。在300余米处，有一层20余米厚的绿帘石、绿泥石夹杂其它破碎岩石的矿化带。钻进至该层处，用清水、皂化油冲洗液钻进，因坍塌、掉块、缩径而无法穿过。83年施工的001孔，用水泥等堵漏、固孔处理达两月之久，未见成效而告终。84年施工以来，我们吸取了以往的教训：因绿帘石、绿泥石多是破碎松散岩层，用水泥很
One of my team’s machines used a φ56 rope coring drill to carry out multi-metal census drilling in a certain area. Stratum mostly gneiss, blasting breccia. Under the mountain zero line drilling, at a hole depth of 50 meters, there is a confined water gushing out of 40 liters / minute (dry season). At more than 300 meters, there is a layer of green curtain more than 20 meters thick, chlorite mixed with other broken rock mineralization. Drilled to this layer, with water, saponified oil rinse drilling, due to collapsed, dropped pieces, reduced diameter and can not be traversed. In 2001, the construction of 001 holes, with cement and other plugging, solid hole processing up to two months, no results ended. 84 years of construction, we learned from the past: Because of epidote, chlorite and more are loose rock, cement is very