裂隙岩体三维渗透张量及表征单元体积的确定

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Abstract Both numerical methods and single-hole packer tests are used in study of the representative elementary volume(REV) and three-dimensional(3D) permeability tensor for fractured rock masses. Based on the probability distribution functions and corresponding statistical parameters investigated in field，3D stochastic discrete fracture networks are randomly generated using the Monte Carlo method. The composite element method(CEM) is used to obtain the permeability tensor and REV of rock masses，with a large quantity of calculations concerning different sample sizes in various directions. The permeability tensor is then modified and improved by using single-hole packer test results. Finally, the proposed method is used in determining the permeability properties of dam foundation of Xiaowan hydropower station. The results show that the proposed method is feasible and reliable.

Key words： rock mechanics three-dimensional permeability tensor representative elementary volume(REV) stochastic fracture network Monte Carlo method composite element method；single-hole packer test

Received: 22 March 2013

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https://rockmech.whrsm.ac.cn/EN/Y2014/V33/I2/309

[1] DERSHOWITZ W S，FIDELIBUS C. Derivation of equivalent pipe network analogues for three-dimensional discrete fracture networks by the boundary element method[J]. Water Resources Research，1999，35(9)：2 685–2 691. [2] JING L，MA Y，FANG Z. Modeling of fluid flow and solid deformation for fractured rocks with discontinuous deformation analysis(DDA) method[J]. International Journal of Rock Mechanics and Mining Sciences，2001，38(3)：343–355. [3] LONG J C S，REMER J S，WILSON C R，et al. Porous media equivalents for networks of discontinuous fractures[J]. Water Resources Research，1982，18(3)：645–658 [4] ODA M. Permeability tensor for discontinuous rock masses[J]. Geotechnique，1985，35(4)：483–495. [5] ODA M. An equivalent continuum model for coupled stress and fluid flow analysis in jointed rock masses[J]. Water Resources Research，1986，22(13)：1 845–1 856. [6] 张有天. 岩石水力学与工程[M]. 北京：中国水利水电出版社，2005：126–127.(ZHANG Youtian. Rock hydraulics and engineering[M]. Beijing：China Water Power Press，2005：112–131.(in Chinese)) [7] HSIEH P A，NEUMAN S P. Field determination of the three- dimensional hydraulic conductivity tensor of anisotropic media[J]. Water Resources Research，1985，21(11)：1 655–1 665. [8] WANG M，KULATILAKE P H S W，UM J，et al. Estimation of REV size and three-dimensional hydraulic conductivity tensor for a fractured rock mass through a single well packer test and discrete fracture fluid flow modeling[J]. International Journal of Rock Mechanics and Mining Sciences，2002，39(7)：887–904. [9] MIN K B，JING L，STEPHANSSON O. Determining the equivalent permeability tensor for fractured rock masses using a stochastic REV approach：method and application to the field data from Sellafield，UK[J]. Hydrogeology Journal，2004，12(5)：497–510. [10] MIN K B，RUTQVIST J，TSANG C，et al. Stress-dependent permeability of fractured rock masses：a numerical study[J]. International Journal of Rock Mechanics and Mining Sciences，2004，41(7)：1 191–1 210. [11] CHEN S H，XU Q，HU J. Composite element method for seepage analysis of geotechnical structures with drainage hole array[J]. Journal of Hydrodynamics：Series B，2004，16(3)：260–266. [12] CHEN S H，FENG X M. Composite element model for rock mass seepage flow[J]. Journal of Hydrodynamics：Series B，2006，18(2)：219–224. [13] CHEN S H，FENG X M，ISAM S. Numerical estimation of REV and permeability tensor for fractured rock masses by composite element method[J]. International Journal for Numerical and Analytical Methods in Geomechanics，2008，32(12)：1 459–1 477. [14] CHEN S H，HE J，SHAHROUR I. Estimation of elastic compliance matrix for fractured rock masses by composite element method[J]. International Journal of Rock Mechanics and Mining Sciences，2012，49(1)：156–164. [15] HE J，CHEN S H，SHAHROUR I. Numerical estimation and prediction of stress-dependent permeability tensor for fractured rock masses[J]. International Journal of Rock Mechanics and Mining Sciences，2013，59(1)：70–79. [16] 纪成亮，李晓昭，王驹，等. 裂隙岩体渗透系数确定方法研究[J].工程地质学报，2010，18(2)：235–340.(JI Chengliang，LI Xiaozhao，WANG Ju，et al. Discrete fracture network model for hydraulic conductivity of fractured rock mass[J]. Journal of Engineering Geology，2010，18(2)：235–340.(in Chinese)) [17] PRIEST S D，HUDSON J A. Estimation of discontinuity spacing and trace length using scanline surveys[J]. International Journal of Rock Mechanics and Mining Sciences and Geomechanics Abstracts，1981，18(3)：183–197. [18] PAHL P J. Estimating the mean length of discontinuity traces[J]. International Journal of Rock Mechanics and Mining Sciences and Geomechanics Abstracts，1981，18(3)：221–228. [19] KULATILAKE P H S W，WU T H. The density of discontinuity traces in sampling windows[J]. International Journal of Rock Mechanics and Mining Sciences and Geomechanics Abstracts，1984，21(6)：354–347. [20] 裴鹿成，王仲奇. 蒙特卡罗方法及其应用[M]. 北京：海洋出版社，1998：3–9.(PEI Lucheng，WANG Zhongqi. The Monte Carlo method and its application[M]. Beijing：Ocean Press，1998：3–9.(in Chinese)) [21] PALMSTROM A. Application of the volumetric joint count as a measure of rock mass jointing [C]// Proceedings of the International Symposium on Fundamentals of Rock Joints. Bjorkliden，Sweden：[s.n.]，1985：103–110.