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针对混煤孔隙分布规律及其瓦斯吸附问题,运用WY-98B瓦斯吸附常数测定仪及ASAP 2020型比表面积及孔隙分析仪,对所选择的典型高瓦斯煤矿的原生结构煤及构造煤制作的混合煤样开展吸附特性测试及孔隙分布测试实验.结果表明:构造煤中的孔隙比表面积较原生结构煤体中的孔隙比表面积增大了82.29%,其中孔隙比表面积随构造煤质量变化呈先增高后降低的变化趋势,并且在构造煤与原生结构煤质量相等的条件下达到最大,同时受混合煤样中构造煤存在的影响导致混合煤样等温吸附量及Langmuir吸附常数的变化随构造煤质量的变化呈现开口向下的二次曲线的变化规律,Langmuir吸附常数随构造煤质量的变化呈现出开口向上的二次曲线的变化规律.实验结果为进一步研究不同条件下煤体的吸附特性提供了理论基础.
Aiming at the problem of pore distribution and gas adsorption of mixed coal, WY-98B gas adsorption constant analyzer, ASAP 2020 specific surface area and pore analyzer were used to analyze the mixture of primary structure coal and tectonic coal in the selected typical high-gas coal mine The results showed that the specific surface area of pores in tectonic coal increased by 82.29% compared with that of primary structure coal, and the pore specific surface area increased first with the change of tectonic coal quality And then decreased, and reached the maximum under the condition that the quality of constructed coal was the same as that of primary structure coal. Meanwhile, the change of isothermal adsorption capacity and Langmuir adsorption constant of mixed coal samples was affected by the presence of structural coal in the mixed coal samples. The variation of Langmuir adsorption constant with the change of the quality of tectonic coal presents the open curve of the quadratic curve.Experimental results provide the theoretical basis for further study on the adsorption characteristics of coal under different conditions Theoretical basis.