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认识吸附在煤体中的瓦斯释放规律,对于预测原煤的瓦斯涌出量具有重要意义。针对提出的特殊问题采用了可计算生产过程(如煤的开采、运输、贮存过程)中的瓦斯解吸速度的方法。 涌出的瓦斯主要由两部分组成,一是存在于煤体内部空隙中的游离瓦斯,二是附着在煤的内表面的吸附瓦斯。游离瓦斯是在煤卸压以后由于吸附平衡破坏而直接释放出来。因为它的体积很小,所以在计算原煤瓦斯涌出量时可以忽略不计。
Understanding the law of gas release adsorbed in coal is of great significance for predicting gas emission from raw coal. Aiming at the proposed special problems, a method of calculating gas desorption velocity in the production process (such as coal mining, transportation and storage) is adopted. Gushing out of gas is mainly composed of two parts, one is free gas existing in the internal void of coal and the other is adsorbed gas attached to the inner surface of coal. Free gas is released directly after the pressure relief due to adsorption equilibrium destruction. Because of its small size, it is negligible when calculating the amount of raw methane gas emission.