煤层瓦斯流动方程研究及应用

Research on equation of gas flow in the coal seam and its application

瓦斯流动方程能够很好地揭示煤层中瓦斯流动的规律,而瓦斯流动规律对瓦斯灾害防治至关重要。运用理论分析对煤层中瓦斯流动模型和流动方程进行了分析与研究。深部岩体的稳定存在状态是球体,而浅部岩体的稳定存在状态为椭球体。在此基础上,构建了瓦斯流动的椭圆形模型,推导出了二维瓦斯流动方程和三维瓦斯流动方程,并利用建立的瓦斯流动方程解释了煤与瓦斯突出的过程,分析并解释了防突规定中石门揭煤保护岩柱2 m和5 m的理论依据,并将该理论应用于涟邵牛马司矿石门揭煤抽放钻孔的布置设计中,取得了很好的效果。

Flow regulation of gas in the coal seam can be well revealed by equation of gas flow, which is for gas disaster prevention. Theoretical analysis was used to study the model of gas flow and equation of gas flow in the coal seam. Based on the stable existence of deep rock mass as a sphere and the stable existence of shallow rock mass as an ellipsoid, ellipse model of gas flow is established, equations of gas flow in 2-dimension and 3-dimension are deduced, and the process of coal and gas outburst is explained through equation of gas flow established. The reason of 2 m and 5 m width of protective rock plug in provisions on prevention of coal and gas outburst is analyzed and explained. In addition, the conclusion drawn in this paper is applied to the layout design of drainage borehole in the process of rock cross-cut coal uncovering in Niumasi coalmine of Lianshao mining bureau with a satisfactory effect.