东北大学学报（自然科学版）

东北大学学报(自然科学版) ›› 2005, Vol. 26 ›› Issue (7): 683-686.DOI: -

• 论著 • 上一篇    下一篇

煤岩体吸附膨胀变形与吸附热力学的参数关系

吴世跃;赵文;郭勇义   

  1. 东北大学资源与土木工程学院;东北大学资源与土木工程学院;太原理工大学矿业工程学院 辽宁沈阳　110004
  • 收稿日期:2013-06-24 修回日期:2013-06-24 出版日期:2005-07-15 发布日期:2013-06-24
  • 通讯作者: Wu, S.-Y.
  • 作者简介:-
  • 基金资助:
    山西省自然科学基金资助项目(991028)

Parametric correlation between expansion deformation of coal mass and adsorption thermodynamics

Wu, Shi-Yue (1); Zhao, Wen (1); Guo, Yong-Yi (2)   

  1. (1) School of Resources and Civil Engineering, Northeastern University, Shenyang 110004, China; (2) College of Mining Engineering, Taiyuan University of Technology, Taiyuan 030024, China
  • Received:2013-06-24 Revised:2013-06-24 Online:2005-07-15 Published:2013-06-24
  • Contact: Wu, S.-Y.
  • About author:-
  • Supported by:
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摘要： 采用吸附容量法测试了不同煤样对CO2,CH4,N2的吸附性能参数,基于所提出的孔隙介质截面吸附润湿长度概念和孔隙结构模型、表面物理化学及弹性力学原理,导出了吸附膨胀应力和应变理论计算公式,并讨论了吸附常数、温度、气体压力、煤岩体比表面积、气体分子吸附截面积等参数对它们的影响·这些公式比现有的公式应用范围广,能方便计算不同约束条件下的吸附膨胀应变和应力·研究还表明煤岩体比表面积和气体吸附分子截面积越大,气体吸附量、煤岩体的吸附膨胀应力及应变越大·

关键词: 吸附, 比表面积, 吸附润湿长度, 表面(膜)压力, 膨胀变形, 气固耦合分析, 有效应力

Abstract: Different coal samples were tested for their adsorptive capacities so as to determine their adsorbability parameters with CO2, CH4 and N2 as adsorbates. According to moistened length as adsorbed by porous media, model of pore structure, surface physico-chemistry and elasticity, the formulas of adsorptive expansion stress and strain of coal mass are derived. In addition, the influence of such parameters as adsorption constants, temperature, gas pressure, specific surface area of coal mass and the cross section area adsorbing gas molecules on the stress and strain are discussed. The formulas can be used more widely than existing ones and easy to calculate the strain and stress under different restrictive conditions. The bigger the specific surface area of coal mass and the cross-section area adsorbing gas molecules, the higher the gas adsorbability and the adsorptive expansion stress and strain of coal mass.

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