【摘要】 本文介绍了大直径钻孔强化抽放瓦斯技术在开滦矿务局赵各庄矿和马家沟矿的试验研究情况。研究结果表明,大直径钻孔比普通钻孔抽放瓦斯量提高一倍以上。更多还原

【Abstract】 This paper deseribes the test and study of the large diameter borehole for the intensified coal -bed degassing conducted in the Zhaogezhuang and Majiagou Mines of Kailuan Coal Mine Administra- tion.The result shows that the large diameter bore- hole can produce a methane quantity over one fold of that by the conventional borehole and therefore, it could open up a new way for high quantity methane drainage as well as for a centralized control of the greenhouse gas discharging.更多还原