型煤吸附不同气体变形规律研究

发布时间：2018-03-19 00:11

  本文选题：采矿工程　切入点：型煤变形规律　出处：《煤矿安全》2017年09期 　论文类型：期刊论文

【摘要】：为了探讨型煤吸附不同压力下的CH_4、N_2以及CO_2的变形特征,利用自行研发的高压瓦斯煤岩吸附-解吸测试系统,对型煤在吸附这3种气体过程中的变形规律进行了研究。结果表明:型煤在不同压力下吸附不同气体的过程都包含抽真空变形、吸附膨胀变形和解吸附压缩变形等3个阶段,且吸附3种气体的膨胀变形规律相似,其轴向变形与环向变形均随时间的增大而逐渐增大;吸附膨胀变形过程中的应变-时间关系都符合Langmuir方程形式;在相同温度和吸附质压力条件下型煤对3种气体的吸附膨胀变形由大到小依次为CO_2、CH_4、N_2;型煤吸附这3种气体膨胀变形过程中的环向应变要大于轴向应变,且随着压力的增大2个方向的变形差异增大。
[Abstract]:In order to study the deformation characteristics of CH4 / N _ 2 adsorbed by briquette under different pressures and CO_2, the self-developed high pressure gas coal and rock adsorption-desorption test system was used. The deformation law of briquette in the process of adsorption of these three gases is studied. The results show that the process of adsorbing different gases under different pressure includes three stages: vacuum deformation, adsorption expansion deformation and adsorption compression deformation. The law of expansion deformation of three kinds of adsorbed gases is similar, the axial deformation and the circumferential deformation increase with the increase of time, the strain-time relationship in the process of adsorption expansion and deformation all accord with the Langmuir equation. Under the same temperature and adsorptive pressure, the order of adsorption expansion deformation of briquette to three gases from large to small is CO2CH4 / N-2; the circumferential strain is larger than the axial strain in the process of adsorbing these three gases. The difference of deformation in two directions increases with the increase of pressure.
【作者单位】： 中国矿业大学(北京)资源与安全工程学院;
【分类号】：TD712
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本文编号：1631948