不同破坏类型煤的吸附势差异性研究

Study on Adsorption Potential Difference of Different Destructive Types of Coal

为弄清不同破坏类型煤吸附甲烷的规律,采用吸附势理论对不同温度煤的甲烷吸附量进行计算,得出不同破坏类型煤的吸附特征曲线及差异性。研究结果表明:随着煤体破坏类型的增加,各阶段孔容都增加,其增大了煤体吸附瓦斯的空间;同一温度下,煤体的破坏类型越大,其吸附量越大,吸附势能也越大;煤体的吸附势随着吸附空间的增加而减小;ε-ω吸附特征曲线与温度无关,吸附势ε与吸附空间ω满足ε=aω3+bω2+cω+d的关系,式中a、b、c、d为常数。

In order to find out the laws of methane adsorption by different types of coal, the adsorption potential theory is used to calculate the amount of methane adsorption of coal under different temperature and obtain the adsorption characteristic curve and difference. The results show that as the failure type of coal increases, the pore capacity increases at all stages, which increases the space for coal to absorb gas; under the same temperature, the greater coal of different destructive types, the greater the adsorption amount and adsorption potential of coal; the adsorption potential of coal decreases with the increase of adsorption space; the adsorption characteristic curve of ε-ω was independent of temperature, and the adsorption potential ε and adsorption space ωmeet the function of ε=aω3+bω2+cω+d, in the formula, a, b, c and d are constants.