综采面瓦斯来源及分布规律现场实测分析

Analysis on Site Measurement of Gas Sources and the Distribution in Fully-mechanized Face

为了分析综采工作面瓦斯涌出来源与分布规律,提出了通过单元法现场测试工作面各瓦斯涌出源所占比例以及工作面瓦斯分布规律,研究结果表明,15102工作面采空区瓦斯涌出量占工作面瓦斯总涌出量的20.75%,来自落煤及煤壁的瓦斯占工作面瓦斯总涌出量的79.25%。在工作面上隅角位置,风流经上隅角将大量采空区瓦斯带出,致使采空区瓦斯进入工作面,引起工作面瓦斯浓度剧烈变化。研究结论对矿井采取合理的工作面瓦斯治理措施具有重要的指导意义。

In order to analyze the gas sources and distribution of the gas emission in fully- mechanized face,element method is proposed to test the proportion of each source of gas emission and gas distribution on site. The results show that Face 15102 gob gas emission accounts for 20. 75% of the total emission volume and gas from the coal wall and off the coal face gas accounts for 79. 25% of total emission. In the upper corner area of the work surface,wind through the upper corner takes a large amount of gas of the gob,resulting in gas of gob into the face and causing dramatic changes of gas concentrations in the face. Reasonable conclusion is important and guiding for mine to take reasonable means to control gas.