While shear flow behavior through fractured media has so far been studied at the scale of single fractures,we propose a numerical analysis on the effect of shearing deformation on the permeability and fluid flow patterns at the scale of fractured rock masses,using a twodimensional distinct element program based on a realistic discrete fracture network realization.With the assumption that the rock matrix is impermeable,linearly elastic and fluid flows only in fractures,we carried out several nume... 

【文章來(lái)源】：紹興文理學(xué)院浙江省

【文章頁(yè)數(shù)】：75 頁(yè)

【學(xué)位級(jí)別】：碩士

【文章目錄】：
ACKNOWLEDGEMENT
ABSTRACT
1.INTRODUCTION
    1.1.Motivations of the Study
    1.2.Objectives and Thesis Layout of the Study
2.STRESS AND FLUID FLOW BEHAVIOR OF ROCK FRACTURES
    2.1.Geology of Rock Mass Fractures
        2.1.1.Genesis of fractures,their propagation and distribution
        2.1.2.Characterization of rock fractures
    2.2.Mechanical Behavior of Rock Fractures under Normal stress and Shear stresses
        2.2.1.Normal stress effects
        2.2.2.Shear stress effects
    2.3.Fluid Flow in Single Rock Fractures and Fracture Networks
        2.3.1.Flow in single fractures
        2.3.2.Flow in fracture networks
    2.4.The Discrete Fracture Network Method
    2.5.Coupled Hydro Mechanical Behavior（HM）of Fractures in Rock Masses
3.METHODOLOGY
    3.1.Fundamentals of DFN Modelling
    3.2.Theory and Numerical Code Description
        3.2.1.Basic function and origin of DEM programming
        3.2.2.Basic features of DEM
        3.2.3.Mechanical behavior of a fracture in DEM
        3.2.4.Fluid flow in fractures in DEM
    3.3.Procedure to Define the Geometry of the Fracture System
        3.3.1.Method to obtain the Geologic data
        3.3.2.Generation of DFN subjected to shear
4.SIMULATION RESULTS AND ANALYSIS
    4.1.Effects of Fracture Stiffness on Permeability
    4.2.Permeability Change as a Function of0.5m Shearing Displacement
    4.3.Mechanical Behavior of the Fracture in Relation to Shear Stress and Shear Displacement
    4.4.Mechanical Behavior of the Fracture in Relation to Normal Stress and Shear Displacement
    4.5.Mechanical Behavior of the Fracture in relation to Normal Displacement and Shear Displacement
5.DISCUSION
6.CONCLUSION
7.REFERENCES



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