剪胀对复杂裂隙岩体渗透性影响的离散元分析

李小琴 李文平

李小琴, 李文平. 2014: 剪胀对复杂裂隙岩体渗透性影响的离散元分析. 工程地质学报, 22(5): 811-817. doi: 10.13544/j.cnki.jeg.2014.05.06
引用本文: 李小琴, 李文平. 2014: 剪胀对复杂裂隙岩体渗透性影响的离散元分析. 工程地质学报, 22(5): 811-817. doi: 10.13544/j.cnki.jeg.2014.05.06
LI Xiaoqin, LI Wenping. 2014: UDEC BASED NUMERICAL STUDY ON PERMEABILITY OF FRACTURED ROCK MASS WITH SHEAR DILATION. JOURNAL OF ENGINEERING GEOLOGY, 22(5): 811-817. doi: 10.13544/j.cnki.jeg.2014.05.06
Citation: LI Xiaoqin, LI Wenping. 2014: UDEC BASED NUMERICAL STUDY ON PERMEABILITY OF FRACTURED ROCK MASS WITH SHEAR DILATION. JOURNAL OF ENGINEERING GEOLOGY, 22(5): 811-817. doi: 10.13544/j.cnki.jeg.2014.05.06

剪胀对复杂裂隙岩体渗透性影响的离散元分析

doi: 10.13544/j.cnki.jeg.2014.05.06
基金项目: 

国家自然科学基金资助项目(41172290),中央高校基本科研业务费专项资金(2012QNA63),江苏高校优势学科建设工程项目资助

详细信息
    作者简介:

    李小琴,女,副教授,博士,主要从事工程地质水文地质研究方面的工作. Email: cumtlxq@126.com

  • 中图分类号: P641

UDEC BASED NUMERICAL STUDY ON PERMEABILITY OF FRACTURED ROCK MASS WITH SHEAR DILATION

  • 摘要: 裂隙岩体流固耦合问题是目前国内外研究热点之一,采用离散元软件UDEC对裂隙岩体发生节理剪胀的渗透性变化规律进行了模拟分析。基于现场调查的裂隙信息统计生成裂隙网络岩体模型。 通过固定垂直应力、不断增加应力比RS(RS=水平应力/垂直应力)使岩体出现剪胀,采用库伦滑移节理模式对岩体在剪胀过程中的渗透性变化情况进行模拟。结果发现:当应力比较小(RS3.1)时,节理水力隙宽、流速、渗透系数等参数都随着应力比的增加表现出明显的降低; 而当岩体出现剪胀现象之后(应力比大于3.1),发生剪切滑移和剪胀现象的节理控制着裂隙岩体的总体渗流行为,与不考虑节理剪胀的计算结果相比,岩体渗透能力出现了显著增长。这一结果表明,剪胀对裂隙岩体渗透性的影响是显著而不可忽视的。
  • [1] Snow D T. Rock fracture spacing, openings and porosities[J]. Journal of the Soil Mechanics and Foundations Division, 1968, 94 (11): 73~91.

    [2] Jones F O.A laboratory study of the effects of confining pressure on fracture flow and storage capacity in carbonate rocks[J]. Journal of Petrol Technology, 1975, 21 (3): 21~27.

    [3] Zhang X,Sanderson D J,Harkness R M,et al. Evaluation of the 2-D permeability tensor for fractured rock masses[J]. International Journal of Rock Mechanics and Mining Scienced & Geomechanics Abstracts, 1996, 33 (1): 17~37.

    [4] Zhang X,Sanderson D J.Effects of stress on the 2-D permeability tensor of natural fracture networks[J]. Geophsical Journal International, 1996, 125 (3): 912~924.

    [5] 陶连金, 姜德义,孙广义,等. 节理岩体中地下水流动的离散元模拟[J]. 煤炭学报, 2000, 25 (1):1~4.

    Tao Lianjing, Jiang Deyi, Sun Guangyi, et al. Modelling of ground water flow in jointed rock masses with distinct element method[J]. Journal of China Coal Society, 2000, 25 (1):1~4.

    [6] Baghbanan A,Jing L R.Stress effects on permeability in a fractured rock mass with correlated fracture length and aperture[J]. International Journal of Rock Mechanics and Mining Sciences, 2008, 45 (8): 1320~1334.

    [7] Cappa F,Guglielmi Y,Soukatchoff V M,et al. Hydromechanieal modeling of a large moving rock slope inferred from slope leveling coupled to spring long-term hydrochemical monitoring: example of the La Clapiere landslide(Southern AIps, France)[J]. Journal of Hydrology, 2004, 291 (1—2): 67~90.

    [8] 王洪涛. 裂隙网络渗流与离散元耦合分析充水岩质高边坡的稳定性[J]. 水文地质工程地质, 2000, 27 (2): 30~33.

    Wang Hongtao. Coupling analysis of high slope stability in water-filled rock by using fracture network seepage and distinct element[J]. Hydrogeology and Engineering Geology, 2000, 27 (2): 30~33.

    [9] 王艳丽, 王勇,许建聪,等. 节理岩质边坡地下水渗流的离散元分析[J]. 地下空间与工程学报, 2008, 4 (4): 620~624.

    Wang Yanli, Wang Yong, Xu Jiancong, et al. Analysis of underground water flow in jointed rock slope with the distinct element method[J]. Chinese Journal of Underground Space and Engineering, 2008, 4 (4): 620~624.

    [10] Makurat A,Barton N,Rad N S,et al. Joint conductivity variation due to normal and shear deformation[A]. Proceedings of the International Symposium on Rock Joints, Balkema, 1990, 535~540.

    [11] Min K B,Rutqvist J,Tsang C F,et al. Stress-dependent permeability of fractured rock masses: A numerical study[J]. International Journal of Rock Mechanics and Mining Sciences, 2004, 41 (7): 1191~1210.

    [12] 刘泉声, 吴月秀,刘滨. 应力对裂隙岩体等效渗透系数影响的离散元分析[J]. 岩石力学与工程学报, 2011, 30 (1): 176~183.

    Liu Quansheng, Wu Yuexiu, Liu Bin. Discrete element analysis of effect of stress on equivalent permeability of fractured rock mass[J]. Chinese Journal of Rock Mechanics and Engineering, 2011, 30 (1): 176~183.

    [13] 吴月秀. 粗糙节理网络模拟及裂隙岩体水力藕合特性研究[博士学位论文][D]. 武汉:中国科学院武汉岩土力学研究所, 2010.

    Wu Yuexiu. Modelling rough joint network and study on hydro-mechanical behavior of fractured rock mass[D]. Wuhan: Institute of Rock and Soil Mechanics Chinese Academy of Sciences, 2010.

    [14] 杨建平, 陈卫忠,吴月秀,等. 裂隙岩体等效渗透系数张量数值法研究[J]. 岩土工程学报, 2013, 35 (6): 1183~1188.

    Yang Jianping, Chen Weizhong, Wu Yuexiu, et al. Numerical study on equivalent permeability tensor of fractured rock masses[J]. Chinese Journal of Geotechnical Engineering, 2013, 35 (6): 1183~1188.

    [15] 赵延林, 王卫军,万文,等. 节理剪胀耦合的岩体渗透特性数值研究与经验公式[J]. 煤炭学报, 2013, 38 (1): 91~96.

    Zhao Yanlin, Wang Weijun, Wan Wen, et al. Numerical study of joint shear dilatation coupling seepage characteristic of rock mass and experiential formula[J].Journal of China Coal Society, 2013, 38 (1): 91~96.

    [16] Itasca Consulting Group.UDEC users guide, Version 3.1[M]. Minnesota, 2000.

    [17] 李小琴. 坚硬覆岩下重复采动离层水涌突机理研究[博士学位论文][D]. 徐州:中国矿业大学, 2011.

    Li Xiaoqin. Study on the inrush mechanism of the water in bed separation due to repeated coal mining under hard rock[D]. Xuzhou: China University of Mining and Technology, 2011.

    [18] 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): 1675~1680.

    Zhang Guike, Xu Weiya. Analysis of joint network simulation method and REV scale[J]. Rock and Soil Mechanics, 2008, 29 (6): 1675~1680.

    [19] 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.

    [20] Min K B,Jing L R.Numerical determination of the equivalent elastic compliance tensor for fractured rock masses using the distinct element method[J]. International Journal of Rock Mechanics and Mining Sciences, 2003, 40 (6): 795~816.
  • 加载中
计量
  • 文章访问数:  3041
  • HTML全文浏览量:  196
  • PDF下载量:  535
  • 被引次数: 0
出版历程
  • 收稿日期:  2014-04-08
  • 修回日期:  2014-07-30
  • 刊出日期:  2014-10-25

目录

    /

    返回文章
    返回