Discrete Fracture Network Model for Hydraulic Conductivity of Fractured Rock Mass<?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" /><o:p></o:p>

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Discrete Fracture Network Model for Hydraulic Conductivity of Fractured Rock Mass

详细信息

责任者：Ji Chengliang (Institute for Underground Space and Geoenvironment ; School of Earth Sciences and Engineering ; Nanjing University ; Nanjing 210093 ; China) ; Li Xiaozhao
刊名：Journal of Engineering Geology
出版年：2010
卷期：18(2)
关键词：裂隙岩体 ; crack rocks ; 渗透系数 ; permeability coefficient
页码：p.235-240
图表：5 illus., 3 tables, 15 refs.
分类号：1702
issnNo：ISSN1004-9665
isbnNo：CN11-3249/P

摘要

Quantification of hydraulic conductivity and principal hydraulic directions of fractured rock mass is very important for its permeability. The hydraulic property of rock mass around geological repository of high-level radioactive waste directly determines its safety in operation. The permeability property of rock mass around the 3# borehole in Beishan Area, Gansu Province is analyzed using the discrete fracture network model. The fracture transmissivity of the fluid flow model is calibrated via simulating the packer test process conducted in the depth range 171.5～178 m of the 3# borehole. The REV (Representative Element Volume) size and principal hydraulic conductivity of the rock mass near the 3# borehole are determined via performing the flow calculations based on the tranmissivity calibrated discrete fracture network model. It is found that the results are compared quite well with those obtained through the radial flow continuum porous media model.