Determining the REV for Fracture Rock Mass Based on Seepage Theory

Zhang, Lili; Xia, Lu; Yu, Qingchun

doi:10.1155/2017/4129240

Cited by 11 publications

(7 citation statements)

References 33 publications

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“…Methods for estimating the hydraulic conductivity of a two-dimensional fracture network have been widely discussed [27][28][29]. Yanqing [27] provides the calculation formula for two-dimensional steady seepage based on the water balance principle in a unit area; it is assumed that the fracture is straight and smooth and the flow in it is laminar:…”

Section: The Permeability Representative Element Volumementioning

confidence: 99%

Topological Representative Element Volume of Fractured Rock Mass

Zhou

Chen

et al. 2022

Applied Sciences

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The representative element volume (REV) of the fractured rock mass is the basis for its homogenization, and is essential for the study of groundwater seepage. In order to determine a simple method for estimating REV, we studied the topological characteristics of the fractured network. We propose the concept of topological representative element volume (TREV) for estimating the fractured rock mass. The topological structure can reflect many properties of the fractured rock mass, to which a great deal of attention has been paid. We examine the applicability of eleven topological parameters as the equivalent parameters of the TREV. According to the selected equivalent parameter, the TREV of twenty-three kinds of fractured rock mass were calculated and then compared with the permeability representative element volume (PREV). The results show that the size of TREV and PREV are essentially the same for a given rock mass. In other words, the PREV can be estimated accurately using the TREV for the rock mass with orthogonal connected fracture networks. The advantage of using TREV to estimate PREV is that there is no need for complex seepage calculations, as the calculation of TREV only needs to account for the geometric characteristics of the fracture network.

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Section: The Permeability Representative Element Volumementioning

confidence: 99%

Topological Representative Element Volume of Fractured Rock Mass

Zhou

Chen

et al. 2022

Applied Sciences

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“…Chen et al [ 23 ] introduced two new methods for determining the REV of fractured rock masses based on the concepts of hydropower station engineering. Zhang et al [ 24 ] determined the REV of a fractured rock mass based on seepage theory. The abovementioned studies have obtained the characteristic size of rocks using different methods.…”

Section: Introductionmentioning

confidence: 99%

Effect of joint roughness coefficient and size on shear and characteristic strengths of structural planes

Zhang

Liang

et al. 2022

PLoS ONE

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Joint roughness coefficients (JRCs) influence the shear and characteristic strengths of structural planes; however, the relationship model of this influence is yet to be derived. This study investigates 11 numerical simulation programs using a realistic failure process analysis software. The influence of size and JRC on the shear strengths of the structural planes was studied. The stress-strain curves of different JRCs and their sizes were analyzed. Mathematical models of the shear strength of structural planes and JRC and sizes were formulated and proposed, and their expressions were obtained. Moreover, mathematical models of JRC and the characteristic size and strength of the structural planes were established.

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“…However, for CJRM, the geometrical morphology of columnar joints is complex and the quantity of fluid exchanges between joints is large, which impacts greatly the value of permeability tensor for CJRM, which cannot be ignored. In recent years, the numerical simulation methods such as Finite Element Method (FEM) and Discrete Element Method (DEM) are often adopted by some scholars to explore permeability properties of rock masses [20][21][22]. However, CJRM are highly jointed, which is hardly dealt by using FEM due to the limitation of mesh generation.…”

Section: Introductionmentioning

confidence: 99%

Investigation of Anisotropic Permeability and Porosity of CJRM considering Different Confinement Loading Pressures

Chao

et al. 2020

Advances in Civil Engineering

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An innovative method is proposed to prepare artificial columnar jointed rock masses (CJRM) with different columnar dip angles, and laboratory physical model tests are conducted to investigate anisotropic permeability and porosity characteristics of the prepared artificial CJRM. In the physical model experiment, permeability and porosity of artificial CJRM with different columnar dip angles is measured during three times cyclic loading and unloading of confinement pressure. Based on the results of the laboratory model tests, the Equivalent Continuum Media Model was applied to analyse anisotropic permeability of CJRM. The main conclusions are summarized as follows. In the first loading phase of confinement pressure, the impacts of confinement pressure on the anisotropic permeability of artificial CJRM, porosity, and the major and minor principle permeability coefficients (PPCs) are significant, while in the following stages of confinement pressure loading and unloading, the change of them is small, with stable value. Permeability of artificial CJRM gradually increases with rise of columnar dip angle, and the permeability anisotropy of artificial CJRM under low confinement pressure is higher than that under low confinement pressure.

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Determining the REV for Fracture Rock Mass Based on Seepage Theory

Cited by 11 publications

References 33 publications

Topological Representative Element Volume of Fractured Rock Mass

Topological Representative Element Volume of Fractured Rock Mass

Effect of joint roughness coefficient and size on shear and characteristic strengths of structural planes

Investigation of Anisotropic Permeability and Porosity of CJRM considering Different Confinement Loading Pressures

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