基于三维裂隙连通率的裂隙岩体表征单元体研究

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摘要三维裂隙连通率综合反映了岩体内裂隙发育特征，是评价工程岩体稳定性的一个重要参数。为合理选取具有代表性的裂隙连通率，基于投影法对水平向三维裂隙连通率的尺寸效应进行分析研究，进一步确定岩体表征单元体尺寸。首先，对实测裂隙数据进行几何参数统计分析，采用逆建模方法建立一个100 m×100 m×140 m的裂隙网络模型。在模型中的10个不同高程上设置水平向的投影基准面，基准面尺寸位于5 m×5 m～100 m×100 m范围。利用投影法计算各投影基准面的三维裂隙连通率，分析三维裂隙连通率随研究尺度的变化情况。采用T检验和F检验判定各级尺寸与最大研究尺寸的研究区域的连通率均值和方差是否存在显著差异。研究结果表明，当研究尺寸达到65 m×65 m时，连通率均值和方差进入稳定状态，该尺寸可视为研究岩体水平方向的表征单元体。

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关键词 ：岩石力学, 裂隙岩体, 表征单元体, 三维裂隙连通率, 尺寸效应

Abstract：Three-dimensional(3D) fracture connectivity，which can comprehensively reflect the fracture features，is a key parameter for evaluating the stability of engineering rock masses. For the purpose of determining a representative 3D connectivity value，the scale effect of 3D connectivity is investigated based on projection method and the representative elementary volume(REV) of the study rock mass is further estimated. First，fracture data collected from an exploration tunnel are statistically analyzed and used to generate a large discrete fracture network of 100 m×100 m×140 m by an inverse method. Inside the fracture network，reference planes with different sizes ranging from 5 m×5 m to 100 m×100 m are sampled 10 times on different elevations. A projection method is adopted to calculate horizontal 3D fracture connectivity of each reference plane and the relationship between the 3D fracture connectivity value and the study domain size is analyzed. The REV of the rock mass is estimated based on a series of T-tests and F-tests. The T-tests and F-tests are performed to determine whether the mean value and variance of fracture connectivity for different sizes are statistically equal to the largest size，respectively. The results show that a size of 65 m×65 m could be viewed as the REV，beyond which the mean value and variance of the connectivity converge to a stable state.

Key words： rock mechanics fractured rock mass representative elementary volume(REV) three-dimensional fracture connectivity scale effect

收稿日期: 2012-09-21

引用本文:

王晓明，夏露，郑银河，于青春. 基于三维裂隙连通率的裂隙岩体表征单元体研究[J]. 岩石力学与工程学报, 2013, 32(s2): 3297-3302.
WANG Xiaoming，XIA Lu，ZHENG Yinhe，YU Qingchun. STUDY OF REPRESENTATIVE ELEMENTARY VOLUME FOR FRACTURED ROCK MASS BASED ON THREE-DIMENSIONAL FRACTURE CONNECTIVITY. , 2013, 32(s2): 3297-3302.

链接本文:

https://rockmech.whrsm.ac.cn/CN/Y2013/V32/Is2/3297

[1]	ODA M. A new method for evaluating the representative elementary volume based on joint survey of rock masses[J]. Canadian Geotechnical Journal，1988，25(3)：440-447. " target="_blank">
[2]	WU Q，KULATILAKE P H S W. REV and its properties on fracture system and mechanical properties，and an orthotropic constitutive model for a jointed rock mass in a dam site in China[J]. Computers and Geotechnics，2012，43：124-142. " target="_blank">
[3]	ZHANG W，CHEN J P，LIU C，et at. Determination of geometrical and structural representative volume elements at the Baihetan dam site[J]. Rock Mechanics and Rock Engineering，2012，45(3)：409-419.
[4]	夏露，刘晓非，于青春. 基于块体化程度确定裂隙岩体表征单元体[J]. 岩土力学，2010，31(12)：3 991-3 996.(XIA Lu，LIU Xiaofei，YU Qingchun. Determining representative elementary volume of fractured rock mass based on blockiness analysis[J]. Rock and Soil Mechanics，2010，31(12)：3 991-3 996.(in Chinese))
[5]	卢波，葛修润，朱冬林，等. 节理岩体表征单元体的分形几何研究[J]. 岩石力学与工程学报，2005，24(8)：1 355-1 361.(LU Bo，GE Xiurun，ZHU Donglin，et al. Fractal study on the representative elementary volume of jointed rock masses[J]. Chinese Journal of Rock Mechanics and Engineering，2005，24(8)：1 355-1 361.(in Chinese))
[6]	张贵科，徐卫亚. 裂隙网络模拟与REV尺度研究[J]. 岩土力学，2008，29(6)：1 675-1 680.(ZHANG Guike，XU Weiya. Analysis of joint network simulation method and REV scale[J]. Rock and Soil Mechanics，2008，29(6)：1 675-1 680.(in Chinese)) " target="_blank">
[7]	KULATILAKE P H S W，PANDA B. Effect of block size and joint geometry on jointed rock hydraulics and REV[J]. Journal of Engineering Mechanics，2000，126(8)：850-858. " target="_blank">
[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. " target="_blank">
[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. " target="_blank">
[10]	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. " target="_blank">
[11]	荣冠，周创兵，王恩志. 裂隙岩体渗透张量计算及其表征单元体积初步研究[J]. 岩石力学与工程学报，2007，26(4)：740-746.(RONG Guan，ZHOU Chuangbing，WANG Enzhi. Preliminary study on permeability tensor calculation of fractured rock mass and its representative elementary volume[J]. Chinese Journal of Rock Mechanics and Engineering，2007，26(4)：740-746.(in Chinese))
[12]	向文飞，周创兵. 裂隙岩体表征单元体研究进展[J]. 岩石力学与工程学报，2005，24(增2)：5 686-5 692.(XIANG Wenfei，ZHOU Chuangbing. The advances in investigation of representative elementary volume for fractured rock mass[J]. Chinese Journal of Rock Mechanics and Engineering，2005，24(Supp.2)：5 686-5 692.(in Chinese)) " target="_blank">
[13]	张占荣，盛谦，杨艳霜，等. 基于现场试验的岩体变形模量尺寸效应研究[J]. 岩土力学，2010，31(9)：2 875-2 881.(ZHANG Zhanrong，SHENG Qian，YANG Yanshuang，et al. Study of size effect of rock mass deformation modulus based on in-situ test[J]. Rock and Soil Mechanics，2010，31(9)：2 875-2 881.(in Chinese))
[14]	杨建平，陈卫忠，戴永浩. 裂隙岩体变形模量尺寸效应研究I：有限元法[J]. 岩土力学，2011，32(5)：1 538-1 545.(YANG Jianping，CHEN Weizhong，DAI Yonghao. Study of scale effect of deformation modulus of fractured rock mass—part I：finite element method[J]. Rock and Soil Mechanics，2011，32(5)：1 538-1 545.(in Chinese)) " target="_blank">
[15]	杨建平，陈卫忠，戴永浩. 裂隙岩体变形模量尺寸效应研究II：解析法[J]. 岩土力学，2011，32(6)：1 607-1 612.(YANG Jianping，CHEN Weizhong，DAI Yonghao. Study of scale effect of deformation modulus of fractured rock mass—part II：analytical method[J]. Rock and Soil Mechanics，2011，32(6)：1 607-1 612.(in Chinese)) " target="_blank">
[16]	ESMAIELI K，HADJIGEORGIOU J，GRENON M. Estimating geometrical and mechanical REV based on synthetic rock mass models at Brunswick Mine[J]. International Journal of Rock Mechanics and Mining Sciences，2010，47(6)：915-926.
[17]	周创兵，陈益峰，姜清辉. 岩体表征单元体与岩体力学参数[J]. 岩土工程学报，2007，29(8)：1 135-1 142.(ZHOU Chuangbing，CHEN Yifeng，JIANG Qinghui. Representative elementary volume and mechanical parameters of fractured rock masses[J]. Chinese Journal of Geotechnical Engineering，2007，29(8)：1 135-1 142.(in Chinese)) " target="_blank">
[18]	MAULDON A D，KARASAKI K，MARTEL S J，et al. An inverse technique for developing models for fluid flow in fracture systems using simulated annealing[J].Water Resources Research，1993，29(11)：3 775-3 789. " target="_blank">
[19]	于青春，大西有三. 岩体三维不连续裂隙网络及其逆建模方法[J]. 地球科学：中国地质大学学报，2003，28(5)：522-526.(YU Qingchun，OHNISHI Y. Three-dimensional discrete fracture network model and its inverse method[J]. Earth Science：Journal of China University of Geosciences，2003，28(5)：522-526.(in Chinese))
[20]	于青春，刘丰收，大西有三. 岩体非连续裂隙网络三维面状渗流模型[J]. 岩石力学与工程学报，2005，24(4)：662-668.(YU Qingchun，LIU Fengshou，OHNISHI Y. Three-dimensional planar model for fluid flow in discrete fracture network of rock masses[J]. Chinese Journal of Rock Mechanics and Engineering，24(4)，662-668.(in Chinese))
[21]	PRIEST S D，HUDSON J A. Discontinuity spacings in rock[J]. International Journal of Rock Mechanics and Mining Sciences and Geomechanics Abstracts，1976，13(5)：135-148. " target="_blank">
[22]	KULATILAKE P H S W，WATHUGALA D N，STEPHANSSON O. Joint network modelling with a validation exercise in Stripe Mine，Sweden[J]. International Journal of Rock Mechanics and Mining Sciences and Geomechanics Abstracts，1993，30(5)：503-526. " target="_blank">
[23]	DERSHOWITZ W S，EINSTEIN H H. Characterizing rock joint geometry with joint system models[J]. Rock Mechanics and Rock Engineering，1988，21(1)：21-51. " target="_blank">
[24]	陈剑平，卢波，谷宪民，等. 用投影法求算岩体结构面三维连通率[J]. 岩石力学与工程学报，2005，24(15)：2 617-2 621.(CHEN Jianping，LU Bo，GU Xianmin，et al. Determining three-dimensional connectivity of rock mass discontinuity by projection[J]. Chinese Journal of Rock Mechanics and Engineering，2005，24(15)：2 617-2 621.(in Chinese))
[25]	刘佑荣，唐辉明. 岩体力学[M]. 武汉：中国地质大学出版社，1999：201-212.(LIU Yourong，TANG Huiming. Rock mechanics[M]. Wuhan：China University of Geosciences Press，1999：201-212.(in Chinese)) " target="_blank">
[26]	左东启，王世夏，林益才. 水工建筑物[M]. 南京：河海大学出版社，1995.(ZUO Dongqi，WANG Shixia，LIN Yicai. Hydraulic structure[M]. Nanjing：Hohai University Press，1995.(in Chinese)) " target="_blank">
[27]	盛骤，谢式千，潘承毅. 概率论与数理统计[M]. 3版北京：高等教育出版社，2001：219-231.(SHENG Zhou，XIE Shiqian，PAN Chengyi. Probability theory and statistics[M]. 3rd ed. Beijing：High Education Press，2011：219-231.(in Chinese)) " target="_blank">