This paper mainly researches on the technique of draining long distance pressure relief gas in bed plate tunnel under the circumstance of mining protective coal seam.
本论文主要是针对远程下保护层开采条件下，对底抽巷上向穿层钻孔抽放远程卸压瓦斯技术进行了深入的研究。
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Principle and problems existing in use about 2ZQB2030 medium draining screen, the matching equipment of dry coal cleaning by use of air-dense medium fluidized bed was introduced.
The results have a referential value for using geostress field draining gas in coal bed and predicting deformations and failure of coal through gas emission.