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Abstract Due to the influence of the strip management of the bottom drainage roadway bthrough the layer, it is not easy to grasp the sealing depth of the borehole constructed at a later stage. The method of "plugging and sealing" was proposed, but with air leakage, combined with the extraction parameters of the existing sealing process, two plugging and one sealing process came out, the drainage effect was improved by 1.5 times and the sealing material was saved by 15.4%.
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