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井筒地面预注浆是封堵含水岩层涌水或加固岩体的有效方法。当注浆深度大,钻孔穿过多个含水层时,必须采用分段钻注的施工方法,止浆塞则是实现分段注浆所不可缺少的机具。 一、概况 目前我国煤炭系统采用地面预注浆施工的井筒越来越多,实践表明,能否严格实现分段注浆是注浆成败的关键。例如开滦荆各庄主井井筒深449米,第一次注浆利用孔口套管向下灌注的方法,历时两年,消耗水泥1018吨、氯化钙10吨、石膏11.6吨,结果无效,被迫停建10年。以后,采用止浆塞进行分段钻注,其注浆孔布置圈径17米,共施工10个
Pre-grouting on the wellbore surface is an effective method to seal water inrush or reinforce rock mass in aquifer. When the grouting depth is large, drilling through multiple aquifers, the construction method must be adopted sub-drilling, grouting plug is to achieve an indispensable grout grouting machine. I. Overview At present, more and more boreholes are used in the pre-grouting construction of coal system in our country's coal system. The practice shows that the key to the success or failure of grouting is whether the grouting can be carried out strictly. For example, the mine shaft drilled 449 meters from Zhuangzhuang, Kailuan, Jingang, the first grouting method using perforated casing downward, lasted two years, consuming 1018 tons of cement, 10 tons of calcium chloride, gypsum 11.6 tons, the result is invalid , Forced to stop building for 10 years. Later, the use of stopper plug segment drilling, the grouting hole diameter 17 meters, a total of 10 construction