为研究煤体灰分、挥发分对煤吸附甲烷性能的影响,运用高容量吸附装置测定同一煤矿不同灰分、挥发分煤样的等温吸附曲线和吸附常数a、b值,并运用SPSS多元线性回归软件进行分析。实验结果表明：不同灰分、挥发分煤样的等温吸附曲线符合Langmuir方程,且二者对于煤吸附甲烷性能均有一定的影响。煤灰分不变时,吸附常数a值随挥发分的增大而线性递增,吸附常数b值随挥发分的增大而线性递减；煤挥发分不变时,a值随灰分的增大而线性递增,b值随灰分的增大而线性递减。研究结果为准确测定煤层瓦斯含量、瓦斯压力等参数提供了一定的理论依据。%In order to study the influence of coal ash content and volatile matter on the coal methane absorption capability, measurement was carried out on the isothermal adsorption curve and the adsorption constants a and b of the coal samples from one coal mine and with different ash content and volatile matter by using a high-capacity adsorption device in the laboratory, and analysis was made on them with the multiple linear regression software SPSS. The experimental results showed that the isothermal adsorption curve of coal samples with different coal ash content and volatile matter well fit the Langmuir equation,and both had a certain influence on the coal methane adsorption performance;when the coal ash content was constant,the adsorption constants a increased linearly with the increase of volatile matter,but the constant b decreased linearly with the increase of volatile matter;and when the volatile matter was constant,the adsorption constants a increased linearly with the increase of coal ash content,but the constant b decreased linearly with the increase of the coal ash content. This research results provided a certain theoretical basis for the accurate determination of the parameters such as coal-seam gas content and gas pressure.
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