高位定向水平长钻孔预抽技术在煤层群开采中的应用

On the Application of the Directional High Level Long Hole Drainage Technology in the Coal Seam Group Mining

以临涣煤矿9111工作面瓦斯综合治理模式为例,研究高位定向水平长钻孔在煤层群开采中的实际应用效果.主要介绍高位定向水平长钻孔的实施方案和技术原理,通过控制变量法,测定各类钻孔抽采参数,结合9111工作面回采期间实际瓦斯涌出情况,研究其实际抽采效果.研究结果表明:通过合理控制钻孔施工层位,能有效的预抽采空区瓦斯、本煤层涌出瓦斯及邻近层卸压瓦斯,能够很好的取代现有的高位钻孔及上向拦截钻孔技术,具有很高的推广应用价值.

Taking the mehing 9111 mining area of Linhuan Coal Mine gas complehensive control mode as an example, it studies the level of high directional long borehole in the coal seam group mining effects in practical application. It mainly introduces the high level of directional drilling plan and technical principle, through the control variable method and the determination of various drilling parameters extraction, which is combined with the situation of gas emission during the 9111 mining face, so as to study the actual extraction effect. Meanwhile , the results of this research show that if we control the horizon in the drilling construction reasonably, we can have the drainage of goal gas effectively. Having got the coal seam gas outburst and the adjacent layer pressure, we use the gas to replace the existing high drilling to intercept drilling, which has the very good application value in practice.