顶板高位钻孔裂隙带抽放在大平矿的应用

Application of Gas Drainage in Fractured Zone by Roof High-level Boreholes in Daping Coal Mine

大平煤矿为了有效治理回采工作面瓦斯涌出量大的问题,分析了13091工作面的瓦斯来源,提出用顶板高位钻孔裂隙带抽放进行工作面瓦斯治理。实践表明,该方法能够较好地抽放工作面顶部裂隙带内聚集的瓦斯,有效地降低了回采工作面回风流及上隅角的瓦斯浓度,确保了工作面的安全顺利回采。

In order to effectively solve the problem of large gas emission in working face of Daping Coal Mine,based on the analysisi of gas sources in 13091 working face,the article proposed a gas drainage method which controls gas emission by using roof high-levelbore- holes in fractured zone. Practice shows that, this method can effectively drain gas which accumulated in fractured zone in the top of working face,and also can effectively reduce the gas concertration in the airflow and in the upper corner of the gas. All this can ensure the smooth recovery of the working face.