protective seam的例句大全

practice of gas control in protective seam face at deep level

深水平保护层工作面瓦斯治理实践

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breaking mechanics analysis on mining protective seam to prevent coal and gas outburst

开采解放层预防煤与瓦斯突出的断裂力学分析

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gas predrainage technology for protective seam with high level drilling site

高位钻场穿层钻孔预抽上覆被保护层瓦斯技术

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forecast of the gas effused from the face in protective seam

保护层开采工作面瓦斯涌出量预测

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deformation rule of protected coal seam exploited by using the long-distance-lower protective seam method

远程下保护层开采被保护煤层变形规律研究

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the blood effused from the wound.

血从伤口流出来。5.Forecast of the gas effused from the face in protective seam保护层开采工作面瓦斯涌出量预测

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similar simulation study of pressure-relief protection angle during extraction of long-interval lower protective seam

开采远距离下保护层卸压保护角的相似模拟研究

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experimental study of gas relief from protected seam by gas drainage through crossing holes in upper airway of protective seam

保护层上风巷穿层钻孔抽采被保护层卸压瓦斯的试验研究

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high level drilling site; protective seam. ;

关键层；高位钻场；预抽瓦斯；

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study on drainage of relieved methane from overlying coal seam far away from the protective seam by surface well

地面钻井抽放上覆远距离卸压煤层气试验研究

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the gas comprehensive extracting out technology of underside protective seam

开采下保护层的瓦斯综合抽放技术

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practice of protective seam extraction of steep, short-interval and complicated seams

急倾斜近距离复杂煤层保护层开采的实践

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physical modeling experiment of extraction of protective seam in dip-slopping coal seams

急倾斜煤层开采解放层相似模拟实验

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comprehensive gas control in extraction of lower protective seam

开采下保护层的瓦斯综合治理技术

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numerical simulation study on extraction of protective seam in dawan coal mine

大湾煤矿保护层开采数值模拟研究

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The research shows that long distance relief gas does not swarm into the working face in protective coal seam, but the permeability of protected coal seam increases thousands of times because of mining long distance nether protective coal seam.

研究表明：远距离下保护层开采后，远程卸压瓦斯基本上不会窜入保护层回采工作面，但被保护煤层的透气性系数得到数千倍的增大。

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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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