余吾煤业主采工作面瓦斯动态变化规律研究

Study on dynamic change law of gas in main working face in Yuwu Coal Mine

为了研究工作面瓦斯动态变化规律,提高煤层瓦斯抽采效果以及改进瓦斯治理技术,以余吾煤业生产工作面为工程背景,通过建立瓦斯吸附解吸试验系统,对余吾煤业工作面煤样进行瓦斯吸附解吸试验,分析工作面煤样解吸过程的试验结果,得出3号煤层的瓦斯解吸扩散规律;沿工作面倾向方向布置瓦斯浓度测试装置,测试其瓦斯浓度动态变化规律,得到工作面动态变化规律和上隅角瓦斯浓度超限的原因。

In order to study the dynamic change law of gas in working face and improve the effect of gas drainage and gas control technology in coal seam,an experiment system for gas adsorption and desorption was independently established by taking the working face of Yuwu Coal Mine as engineering background,the gas adsorption and desorption experiments on different coal samples of Yuwu Coal Mine was conduct,and through comparing and analyzing the experimental results in desorption process of coal samples,the gas desorption and diffusion law of gas in No.3 coal seam in Yuwu Coal Mine was obtained.And the dynamic change law of gas concentration was tested by the gas concentration test device arranged along the dip direction of the working face,and the reason why gas concentration exceeded the limit in the upper corner of working face was achieved.