含水率对煤样瓦斯放散动力学特性影响的实验研究.

In order to better study the effect of moisture content on gas emission characteristics and laws of coal samples, this paper used the independently developed experimental device for determining the gas emission characteristics of coal samples to test the gas emission of coal samples under different moisture content. The kinetic equation can intuitively reflect the relationship between the moisture content and the gas emission efficiency of the coal sample. Therefore, four kinds of kinetic models, pseudo-first-class, pseudo-secondary, Elovich, and parabolic, are used to fit gas discharge at different water cuts. Investigate the law of moisture content on the dynamic characteristics of coal-like gas diffusion. The results show that the gas discharge rate of coal samples increases with the increase of time under different moisture content, and the presence of water will reduce the gas emission of coal samples. The water content is positively correlated with the quasi-first-order rate constant k1, the second-order rate constant k2, and the Elovich rate constant β, and is negatively correlated with the rate constant k3 of the parabola model. Quasi-first-order and quasi-second-order kinetics. The equilibrium liberation quantity q1, q2 in the model gradually decreases with the increase of the moisture content, that is, it has a negative correlation. Comparing with the four dynamic models, the best fitting effect is the Elovich dynamic model. That is to say, the Elovich dynamic model can better describe the dynamic characteristics between the water content and the bleeder, in order to further study its law of gas dispersion. [ABSTRACT FROM AUTHOR]