| 糜棱岩形成过程的空洞损伤-局部低围压破碎机制 |
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| 引用本文： | 白嘉楠,李和平,胡宗军. 糜棱岩形成过程的空洞损伤-局部低围压破碎机制[J]. 合肥工业大学学报(自然科学版), 2002, 25(4): 558-560 |
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| 作者姓名： | 白嘉楠 李和平 胡宗军 |
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| 作者单位： | 合肥工业大学,土木建筑工程学院,安徽,合肥,230009 |
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| 摘 要： | 提出一个糜棱岩形成过程中变形和破碎的新机制 :空洞损伤 -局部低围压破碎机制。认为原岩在糜棱化过程中经历了两个主要阶段 ,即由流动构造运动引起韧性的空洞损伤阶段和空洞损伤所形成的多孔介质受局部低围压效应影响发生的破碎阶段。使用有限元方法结合莫尔 -库仑破碎准则对这种多孔介质进行了破碎过程的数字模拟计算 ,计算结果表明破碎是可能的
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| 关 键 词： | 糜棱岩 多孔介质 围压效应 |
| 文章编号： | 1003-5060(2002)04-0558-03 |
| 修稿时间： | 2001-08-30 |
Porosity-damage and local-low-ambient-pressure-crush mechanism in the formation of mylonite |
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| BAI Jia-nan,LI He-ping,HU Zong-jun. Porosity-damage and local-low-ambient-pressure-crush mechanism in the formation of mylonite[J]. Journal of Hefei University of Technology(Natural Science), 2002, 25(4): 558-560 |
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| Authors: | BAI Jia-nan LI He-ping HU Zong-jun |
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| Abstract: | A new mechanism of deformation and crush in the formation of mylonite,porosity-damage and local-low-ambient-pressure-crush mechanism,is given in this paper. The former rock goes through two main periods in the course of mylonization: the period of tenacious porosity damage due to the flow construction motion and the period in which porous media formed by porosity damage are crushed by the local low ambient pressure. The finite element method and Mohr-Coulomb damage rule are used to calculate the porous media damage course. The result indicates that the damage of the porous media is completely possible. |
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| Keywords: | mylonite porous media ambient pressure effect |
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