李玉林, 陈至达, 虎维岳, 李竞生. 有限变形应变与裂隙网络渗透系数耦合模型[J]. 煤田地质与勘探, 1999, 27(2): 32-35.
引用本文: 李玉林, 陈至达, 虎维岳, 李竞生. 有限变形应变与裂隙网络渗透系数耦合模型[J]. 煤田地质与勘探, 1999, 27(2): 32-35.
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Li Yulin, Chen Zhida, Hu Weiyue, Li Jingsheng. THE COUPLING MODEL OF LARGE DEFORMATION STRAIN AND PERMEABILITY IN FISSURE NET[J]. COAL GEOLOGY & EXPLORATION, 1999, 27(2): 32-35.
Citation: Li Yulin, Chen Zhida, Hu Weiyue, Li Jingsheng. THE COUPLING MODEL OF LARGE DEFORMATION STRAIN AND PERMEABILITY IN FISSURE NET[J]. COAL GEOLOGY & EXPLORATION, 1999, 27(2): 32-35.
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有限变形应变与裂隙网络渗透系数耦合模型

THE COUPLING MODEL OF LARGE DEFORMATION STRAIN AND PERMEABILITY IN FISSURE NET

    摘要
  • 摘要: 根据有限变形力学理论,编制了弹性均质岩层在采矿影响下位移和应变的有限元计算程序,并根据岩层位移可改变裂隙宽度,进而引起裂隙渗透系数变化的思路,实现了有限变形应变与裂隙网络渗透系数的耦合分析,并就一个采矿引起顶板岩层裂隙渗透系数变化的模型进行了分析计算。结果表明,纵向裂隙的渗透系数增大约4倍,而在不考虑顶板岩层离层的情况下,横向裂隙的渗透系数减少约4倍。可见顶板岩层的变形对裂隙网络的渗透系数有显著的影响。

     

    Abstract: On the basis of deformation mechanics,the paper promotes FEM program for the displacement and strain calculation of elastic,homogenous rock layers under mining,and realizes the coupling analysis of large deformation strain and fissure net permeability according to relations between displacement of rock layer and breadth of fissure.There is a model analysis and calculation for the change of fissure permeability of roof rock layers under mining.The results show that vertical fissure permeability increases about 4 times,and horizontal one decreases about 4 times under the condition of non-considering roof rock layers break.That is to say,the deformation in roof rock layer have a great influence on the fissure permeability.

     

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