工作面回风巷瓦斯分布研究及监测布置探讨

Study of Gas Distribution in Return Airway of Working Face and Discussion of Layout of Gas Monitoring Points

  • 摘要: 测试了采煤工作面回风巷不同位置断面的瓦斯体积分数,作出了巷道断面的瓦斯分布云图,研究了回风流瓦斯体积分数分布规律, 得出结论:距离工作面不同位置的巷道断面上瓦斯体积分数分布是不均匀的,瓦斯随着风流运移约100 m后才能逐渐和空气混合均匀;上隅角涌出的采空区瓦斯对巷道瓦斯体积分数分布影响较大。对工作面回风流瓦斯监测及传感器布置提出了改进建议,即回风巷道瓦斯传感器应该布置在巷道的中线上,距离顶板不大于300 mm,距上隅角10 m处也应布置一个传感器测点。

     

    Abstract: Gas concentrations of different sections in return airway of working face were tested, and the gas distribution contours of roadway section were made for studying gas concentration distribution. Conclusions: gas distribution in different sections of roadway is uneven, and gas will be fully homogeneous with air after moving 100 m in front of working face; goaf gas pouring out through the upper corner has a greater impact on distribution of gas concentration. Recommendations for layout of gas monitoring points and sensors in return air of working face were provided, namely gas sensors in return airway should be arranged in central line of the roadway less than 300 mm away from the roof, and a sensor measuring point should be arranged at the place 10 m away from the upper corner.

     

/

返回文章
返回