煤的瓦斯渗透性影响因素的探讨

对南桐煤田煤样的渗透率进行了实验室研究,探讨了瓦斯的解吸特性、温度、煤中水分对瓦斯渗透的影响。结果表明,在瓦斯无解吸的情况下,瓦斯压力降低,煤的渗透率也降低,然而在解吸瓦斯压力怍用下,煤对瓦斯的渗透率会增加。煤样瓦斯的渗透率的对数与温度成线性关系。含水煤样的渗透率明显低于干煤样的渗透率,随着含水量的增加,煤样瓦斯的渗透率减小。

Study on the Factors Affecting Gas Permeability of Coal

In this paper,the permeability of coal from Nantong colliery is studied in a laboratory. The effects of desorbed gas temperature and water content on gas permeability were investigated. The results of experiments indicated that decreasing gas pressure without desorption, the permeability of coal decreases. However, below the desorption pressure, the permeability of coal for methane increases. The results suggest that the logarithm of permeability of coal is a linear function of the temperature and the permeability of coal saturated with water is less than the permeability of dry coal; with the increase of water content,the permeability of coal for methane is increasing.