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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。
In order to clarify the action mechanism of coal seam water injection on methane emission, combined with the existing experimental conditions to study the influence of moisture content in coal sample on the initial velocity of coal gas evolution, the coal samples with different metamorphic degrees The results show that the initial velocity of coal release is in a logarithmic relationship with the moisture content in coal sample. The water content in the coal sample slowed down the initial velocity of gas release. The higher the degree of deterioration of the coal sample, the greater the effect of moisture on it. When the coal sample contained 2% -7% moisture, the initial gas release from the coal sample When the water content in the coal sample is more than 10%, the influence of moisture content on the gas release rate of the coal sample decreases with the increase of water content in the coal sample.