论文部分内容阅读
为研究煤体瓦斯解吸过程瓦斯初始扩散规律,采用理论分析煤粒瓦斯解吸扩散过程,根据扩散方程解析得到瓦斯初始有效扩散系数和扩散动力学参数的近似解计算方法.对振兴二矿煤样进行不同粒径煤样、不同温度条件和不同吸附平衡压力条件下的煤粒瓦斯解吸扩散实验,并计算各种实验状态下的瓦斯初始有效扩散系数和扩散动力学参数.研究结果表明:初始有效扩散系数与吸附平衡压力、温度和煤样粒径呈正相关.不同粒径的煤粒,在压力和温度相同的平衡条件下,煤粒的粒径越大,初始有效扩散系数越大.同一粒径条件下,初始有效扩散系数随温度和吸附平衡压力的升高而增大.而动力学扩散参数则基本随着粒径的减小而增大,随吸附平衡压力和温度的升高而增大.
In order to study the initial gas diffusion law of coal gas desorption process, the desorption and diffusion process of coal gas was theoretically analyzed, and the approximate solution of the initial effective diffusion coefficient and diffusion kinetic parameters of gas was obtained by analyzing the diffusion equation. Coal gas desorption and diffusion experiment under different particle size coal samples, different temperature conditions and different adsorption equilibrium pressure, and calculate the initial effective diffusion coefficient and diffusion dynamic parameter under various experimental conditions.The results show that initial effective diffusion Coefficients are positively correlated with adsorption equilibrium pressure, temperature and particle size of coal sample. Coal particles with different particle sizes, under the same equilibrium conditions of pressure and temperature, the larger the particle size of coal particles, the larger the initial effective diffusion coefficient. , The initial effective diffusion coefficient increases with the increase of temperature and adsorption equilibrium pressure, while the dynamic diffusion parameter increases with the decrease of particle size and increases with the increase of adsorption equilibrium pressure and temperature .