祁东煤矿松散层第四含水层破损放水孔的封堵
Plugging for Damaged Drainage Hole in the Fourth Aquifer of Qidong Coal Mine Unconsolidated Formation
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摘要: 为了确保祁东煤矿7131工作面的回采安全，需对工作面风巷32#放水孔进行封堵，该孔因质量问题无法利用原有套管进行注浆封堵，采用孔内下套管，注浆及注入骨料等办法，成功地封堵了该破损放水孔。Abstract: To ensure the safety of Qidong Coal Mine 7131 working face, we need to plug 32# drainge hole ar airway. However, the hole is unable to use the original casing to grout and plug due to the quality problems. Using hole casing, grouting and other methods to inject aggregate, we successfully plug the damaged drainage hole.
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