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我队在昌平某钼矿区、延庆某钼矿区、昌平某铜矿区分别采用低固相泥浆进行护孔、堵漏，取得较好的成效。昌平某钼矿区，围岩是蚀变石英正长岩，经断层破坏，岩石破碎，开放式裂隙，漏失严重。施工了大小口径15个钻孔，皆因遇到破碎带，严重坍塌、掉块、涌水而被迫终孔。只完成设计孔深的68％，除个别孔基本合格之外，都没有达到地质要求，严重影响对矿区的综合评价。我们在总结经验教训的基础上，在ZK21号孔，坚持使用低固相泥浆，并严格执行提钻过程中进行泥浆回灌，顺利通过五个较大的断层破碎带（近十米至八十米的破碎岩
My team in Changping a molybdenum mining area, Yanqing a molybdenum mining area, Changping a copper mining area were using low-solid mud hole, plugging, and achieved good results. Changping a molybdenum mining area, the surrounding rock is altered quartz syenite, the fault damage, rock crushing, open fissures, serious loss. The construction of the size of 15 holes, all because of the broken belt, a serious collapse, dropped pieces, water was forced to end hole. Only 68% of the designed hole depths were completed. All the holes except for the basic holes were not qualified, which seriously affected the comprehensive evaluation of the mining area. Based on our experience and lessons learned, we stuck with the use of low-solid mud at hole ZK21 and carried out mud recharging during the rigorous drilling. We successfully passed five large fault fracture zones (nearly ten to eighty Broken rock rice