... 破碎顶板 cracked roof 解放层 protective coal seam 电阻应变仪 resistance strain instument 坑口电厂 pithead power plant ...
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The research shows that: overlying coal seam by protected gets fissures after mining protective coal seam. And permeability coefficient of protected coal seam increases several thousand times.
研究表明:保护层开采后上覆被保护层产生采动裂隙,从而导致被保护煤层的透气性系数得到数千倍的增大。
参考来源 - 地面钻孔抽采被保护层卸压瓦斯技术研究·2,447,543篇论文数据，部分数据来源于NoteExpress
When the protective coal seam is mined, the gas management on the protected coal seam is a very important job.
保护层开采时，对被保护层的瓦斯治理是一项非常重要的工作。
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。
The paper researchs the principle of protective seam mining, hydraulic slotting method and executing-digging technology to avoid risk of coal-gas outburst, and its practices in coal mine.
通过分析近距离保护层开采、水力掏槽法及边抽边掘技术防治煤与瓦斯突出原理及实践应用，从而有利于煤与瓦斯突出矿井选择合理有效的防突技术。
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