摘要
为研究煤的纳米级(<100 nm)孔隙对瓦斯吸附能力的影响,对3种不同煤样的原煤和构造煤孔隙结构进行研究,并建立温度-压力综合吸附模型分析煤体的吸附瓦斯能力。研究结果表明:纳米级孔隙(孔径小于100 nm)是煤对瓦斯吸附强的决定因素,纳米级孔隙微孔的比表面积是影响瓦斯吸附量的主要因素;在相同温度压力下,古汉山矿煤样瓦斯吸附量是薛湖矿煤样和平顶山矿煤样的1.3~1.8倍和1.02~1.2倍;微小孔的孔容与瓦斯吸附量呈现出明显的正相关;通过建立温度-压力模型预测瓦斯吸附量是可行的。
In order to study the influence of nanoscale pore(<100 nm) on gas adsorption capacity, the pore structure of raw coal and structural coal of three different coal samples was studied. Moreover, a temperature-pressure comprehensive adsorption model was established to analyze the gas adsorption capacity of coal. The results show that nanoscale pore(pore diameter less than 100 nm) is the decisive factor of gas adsorption strength of coal, and the specific surface area of nanoscale pore is the main factor affecting gas adsorption; under the same temperature and pressure, the adsorption capacity of Guhanshan Mine was 1.3 to 1.8 times that of Xuehu Mine and 1.02 to 1.2 times that of Pingdingshan Mine; there was a significant positive correlation between the pore capacity and gas adsorption capacity. It is feasible to predict gas adsorption capacity by establishing temperature-pressure model.
引文
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