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为研究粒径、含水量、温度、挥发分等因素对煤样吸附瓦斯特性的影响,选取4个典型矿井煤样,进行不同影响因素下的等温吸附试验,探讨各因素对煤样吸附瓦斯的敏感程度及影响规律。结果表明:在粒径、含水量、温度、挥发分等因素影响下,煤样吸附瓦斯过程仍可用Langmuir方程表征;挥发分、温度、粒径分别对吸附常数a,b及吸附饱和度X的影响程度最大;吸附常数a随粒径、含水量、温度、挥发分的增大而减小,吸附常数b及吸附饱和度X随粒径、含水量的增大而减小,随温度、挥发分的增大而增大;吸附常数a,b及吸附饱和度X受以上4个因素的影响程度不同,与其均呈一定的函数关系,据此可构建综合计算模型。
In order to study the influence of particle size, water content, temperature and volatile content on the gas adsorption characteristics of coal samples, four typical coal samples were selected to carry out isothermal adsorption experiments under different influence factors. The effects of various factors on gas adsorption Sensitivity and influence of law. The results show that the gas adsorption process can still be characterized by Langmuir equation under the influence of particle size, water content, temperature, volatiles and other factors. Volatilization, temperature and particle size can be used to determine the adsorption constants a, b and adsorption saturation X The adsorption constant a decreases with the increase of particle size, water content, temperature and volatilization. The adsorption constant b and adsorption saturation X decrease with the increase of particle size and water content. With the increase of temperature, the adsorption constant a Points increase and increase; adsorption constants a, b and adsorption saturation X by the above four factors have different degrees, with a certain relationship between the function, which can be constructed based on the comprehensive calculation model.