采煤工作面过高位钻场期间瓦斯治理技术

Gas Control Technology for Mining Face Passing Through High-level Drilling Site

为了解决高瓦斯采煤工作面过高位钻场期间瓦斯涌出不均衡、瓦斯涌出量大的问题,通过对采煤工作面与高位钻场的位置关系、瓦斯运移规律、瓦斯集聚带分布特点进行分析,得出了钻场前50m范围抽采盲区、钻场排放瓦斯期间和工作面推过高位钻场时顶板垮落期间等瓦斯涌出关键点,并制定了钻孔搭接、超前预抽等瓦斯治理措施,保证了矿井安全生产。

In order to solve the problems of unbalanced gas emission and large gas emission during the course of high gas mining face passing through high-level drilling site, the position relationship between coal mining face and highlevel drilling site, the law of gas migration and the distribution characteristics of gas accumulation zone are analyzed and summarized, and the blind area of extraction in the first 50m range of drilling site, the period of gas emission from drilling site and the roof collapse when the working face passes through high-level drilling site are obtained. In view of these characteristics, gas control measures, such as drilling lapping, advance pre-drainage and so on, are formulated to ensure the safe production of coal mines.