裂隙岩体渗流概念模型研究.pdfVIP

第25 卷第2 期 岩 土 力 学 Vol.25 No.2 2004 年2 月 Rock and Soil Mechanics Feb. 2004 文章编号：1000－7598 －(2004) 02―0226―07 裂隙岩体渗流概念模型研究 宋晓晨，徐卫亚 （河海大学 岩土工程研究所，江苏 南京 210098 ） 摘 要：裂隙岩体中的渗流和传统的多孔介质渗流在机理上存在本质的差别，这种差别主要表现为裂隙岩体在各种尺度上 存在的非均质性。模拟裂隙岩体渗流的主要困难在于描述这种非均质性。目前的概念模型，包括等效连续体模型、离散裂 隙网络模型和混合模型使用了不同的技术来预测裂隙岩体中的渗流。这些模型基于不同的假设和概念框架，有着各自不同 的优缺点。在实际应用时，应当根据研究域的具体特点和所要解决的问题的要求对其选择，此外，还讨论了单裂隙的概念 模型。 关 键 词：裂隙岩体；渗流；概念模型；单裂隙 中图分类号：O 357.3；TB 115 文献标识码：A A study on conceptual models of fluid flow in fractured rock SONG Xiao-chen, XU Wei-ya ( Research Institute of Geotechnical Engineering, Hohai University, Nanjing 210098, China ) Abstract: There is essential difference between fluid flow in fractured rock and that in conventional porous media; it is presented as the structure heterogeneities over a broad range of scales. The mainly difficulties for simulating fluid flow in fractured rock are the characterization of that heterogeneities. Conceptual models of present day, including equivalent continuum models, discrete fracture network models and hybrid models, use different techniques to predict flow and transport in fractured geological media. Based on different assumptions and conceptual frameworks, these models have respectively different advantages and disadvantages; the selection for application of them should be dependent on the in-situ speciality and the requiring of concerned problems. Besides, the conceptual models for fluid flow in single fracture are also discussed. Key words: fractured rock ; fluid flow ; conceptual models; single fracture 岩体的渗流有着不同的特点。岩体中一般分 1 引 言