新疆阜康矿区煤层孔隙结构特征的氮吸附实验研究

发布时间：2018-07-12 15:08

本文选题：阜康矿区 + 氮吸附　；参考：《西安科技大学学报》2015年06期

【摘要】：为研究新疆阜康矿区主采煤层吸附孔孔隙结构特征,选取该矿区四个典型煤样,基于低温氮吸附实验绘制了煤样的吸附解吸等温线,得到煤的孔隙直径,采用BET模型和BJH模型计算了孔隙比表面积和体积等参数,分析了煤样孔隙比表面积及体积分布规律。结果表明:新疆阜康矿区煤的吸附解吸等温线回滞环很小,吸附孔以一段开口的均匀圆筒形孔为主。煤样吸附孔发育程度差别明显,导致各煤层对瓦斯吸附储存能力有所不同。各煤样孔径分布较为均衡,比表面积以过渡孔占比最大,其次为微孔及中孔;过渡孔和中孔的孔隙体积占比较大,微孔较小。煤样孔隙体积分布规律基本一致,比表面积在过渡孔和中孔范围内分布规律相同,微孔范围内分布差异较大。
[Abstract]:In order to study the pore structure characteristics of main coal seams in Fukang mining area of Xinjiang, four typical coal samples were selected and the adsorption and desorption isotherms of coal samples were drawn based on low temperature nitrogen adsorption experiments, and the pore diameter of coal was obtained. BET model and BJH model were used to calculate the pore specific surface area and volume, and the pore specific surface area and volume distribution of coal samples were analyzed. The results show that the adsorption and desorption isotherm hysteresis loop of coal in Fukang mining area of Xinjiang is very small, and the adsorption hole is mainly a uniform cylindrical hole with an open section. The development degree of adsorption hole of coal sample is very different, which results in different gas adsorption and storage ability of coal seam. The pore size distribution of each coal sample is more balanced, the specific surface area is the largest in transition pore, followed by micropore and mesopore, the pore volume of transition pore and mesopore is larger, and the pore volume of transition pore and mesopore is smaller. The pore volume distribution of coal samples is basically the same, and the specific surface area is the same in the range of transition pore and mesopore, but the distribution of micropore is quite different.
【作者单位】：西安科技大学能源学院;新疆煤炭科学研究所;兖矿新疆矿业有限公司硫磺沟煤矿;
【基金】：新疆维吾尔自治区科技支撑基金资助项目(201333110)
【分类号】：TD712

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