注水煤瓦斯放散特性的研究

为了弄清煤层注水对瓦斯放散的作用机理,结合现有的实验条件以煤样中水分含量对煤样瓦斯放散初速度的影响为切入点进行研究,通过实验,研究不同变质程度的煤样在不同含水率情况下瓦斯放散初速度的变化规律,实验结果表明煤样的放散初速度与煤样内含水率呈对数关系。煤样中的水分减缓了瓦斯放散初速度,煤样的变质程度越高,水分对其的影响就越大,且当煤样中含有2%~7%的水分时对煤样的瓦斯初始放散速度影响最大,当煤样中的含水率大于10%时,随着煤样中水分的增加,水分含量对煤样瓦斯放散速度的影响越来越小。

Research on Gas Diffusion Characteristic of Injected Water Coal

In this paper,to find out the mechanism of coal seam water injection to the gas diffusion,according to the exiting experimental conditions,the effect of moisture content of coal samples to the initial velocity of gas diffusion was taken as the breakthrough point for our research.Through the experiment,the initial velocities of gas diffusion of the coal samples with different metamorphic degrees in different moisture situations were studied.The experiment results show that the logarithmic relationship is existed bwtween the initial velocity of coal gas diffusion and the moisture content,and the initial velocity of gas diffusion is alleviated due to the water content in coal sample.In addition,the higher the metamorphic degree of coal sample is,the bigger influence of the moisture is.Moreover,it has the biggest influence when the moisture of coal sample is around 2%~7%,and when the moisture of coal sample is over 10%,the increasing of moisture content has smaller and smaller influence to the initial velocity of coal sample.