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。
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.
介绍空气重介流化床干法选煤的配套设备2ZQB2030干法脱介筛的工作原理，分析运用中存在的问题，针对存在的问题提出了相应的改进措施。
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.
研究结果对于利用地应力场抽采瓦斯、通过瓦斯涌出量预测煤岩的变形破坏具有现实指导意义。
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.
研究结果对于利用地应力场抽采瓦斯、通过瓦斯涌出量预测煤岩的变形破坏具有现实指导意义。
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