考虑双重孔隙–裂隙岩体中强度异向性的THM耦合有限元分析

doi:10.13722/j.cnki.jrme.2014.0107

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摘要计入裂隙连通率，进一步完善了确定双重孔隙–裂隙介质岩体的黏聚力及内摩擦角的方法，将其引入独立开发的热–水–应力耦合二维弹塑性有限元程序中。假定一个位于饱和岩体中的实验室尺度的核废物地质处置库模型，以此为计算背景，拟定裂隙组正交和斜交的二种情况，进行热–水–应力耦合有限元分析。结果表明：与裂隙组正交时的各场量呈轴对称分布相比，两组裂隙斜交时，孔隙水压力及其流速呈轴对称分布，但岩体中的应力场、裂隙水压力及其流速、塑性区均呈非轴对称分布；裂隙组正交时岩体中的塑性区大面积出现，而裂隙组斜交时岩体中几乎无塑性区产生；岩体中裂隙组的产状强烈地影响到应力场、塑性区和裂隙水的状态。

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关键词 ：岩石力学, 双重孔隙&ndash, 裂隙介质, 强度异向性, 弹塑性模型, 热&ndash, 水&ndash, 应力耦合, 有限元分析

Abstract：A method of determining the cohesion and internal friction angle of a dual-pore-fracture rock mass was improved by considering fracture connection ratio，and this method was introduced into the elasto-plastic thermo-hydro-mechanical(THM) coupling finite element method(FEM) code. Aiming at a model of hypothetical nuclear waste repository in a saturated dual-pore-fracture rock mass with a laboratory scale，the THM coupling FEM analyses were carried out for two assumed cases with orthogonal fracture sets and oblique-cross fracture sets，respectively. The results show that：compared with the axisymmetric distributions of various field quantities in the case with orthogonal fracture sets，the distributions of pore pressures and flow velocities of underground water are axisymmetric，but the distributions of stresses，fracture pressures and relative flow velocities，plastic zones in the rock mass are non-axisymmetric for the case with oblique-cross fracture sets. A large area of plastic zone occurs in the case with orthogonal fracture sets，but almost no plastic zone is produced in the case with oblique-cross fracture sets. The occurrence of fracture sets strongly influences the states of stress，plastic zone and fracture pressure in rock mass.

Key words： rock mechanics dual-pore-fracture medium strength anisotropy elasto-plastic model thermo- hydro-mechanical coupling FEM analysis

引用本文:

张玉军1，张维庆2. 考虑双重孔隙–裂隙岩体中强度异向性的THM耦合有限元分析[J]. 岩石力学与工程学报, 2015, 34(s1): 2759-2766.
ZHANG Yujun1，ZHANG Weiqing2. FEM ANALYSES FOR THM COUPLING IN DUAL-PORE-FRACTURE ROCK MASS CONSIDERING STRENGTH ANISOTROPY. , 2015, 34(s1): 2759-2766.

链接本文:

http://www.rockmech.org/CN/10.13722/j.cnki.jrme.2014.0107 或 http://www.rockmech.org/CN/Y2015/V34/Is1/2759

[7]	郑少河，朱维申. 裂隙岩体渗流损伤耦合模型的理论分析[J]. 岩石力学与工程学报，2001，20(2)：156-159.(ZHENG Shaohe，ZHU Weishen. Theoretical analysis on a coupled seepage-damage model of fractured rock mass[J]. Chinese Journal of Rock Mechanics and Engineering，2001，20(2)：156-159.(in Chinese))
[8]	刘泽佳，李锡夔. 非饱和多孔介质中混合元法的化学-热-渗流-力学耦合的本构模拟[J]. 计算力学学报，2007，24(4)：397-402. (LIU Zejia，LI Xikui. The coupled chemo-thermo-hydro-mechanical constitutive modeling for the mixed finite element of unsaturated porous media[J]. Chinese Journal of Computational Mechanics，2007，24(4)：397-402.(in Chinese))
[9]	张玉军，杨朝帅，琚晓冬. 一种确定双重孔隙介质黏聚力与内摩擦角的方法及其有限元分析[J]. 中国科学：技术科学，2014，44(2)：182-188.(ZHANG Yujun，YANG Chaoshuai，JU Xiaodong. A method for determining cohesion and internal friction angle of dual-pore-fracture medium and the relative FEM analyses[J]. Scientia Sinica Technologica，2014，44(2)：182-188.(in Chinese))
[12]	沈观林，胡更开. 复合材料力学[M]. 北京：清华大学出版社，2006，172-176.(SHEN Guanlin，HU Gengkai. Mechanics of composite materials[M]. Beijing：Tsinghua University Press，2006，172-176.(in Chinese)) " target="_blank">
[13]	徐芝纶. 弹性力学(上册)[M]. 北京：人民教育出版社，1980：242-243.(XU Zhiluan. Elastic mechanics(Volume 1)[M]. Beijing：People's Education Press，1980：242-243.(in Chinese)) " target="_blank">
[14]	张玉军. 遍有节理岩体的双重孔隙-裂隙介质热-水-应力耦合模型及有限元分析[J]. 岩石力学与工程学报，2009，28(5)：947-955.(ZHANG Yujun. Coupled thermo-hydro-mechanical model and finite element analyses of dual-porosity fractured medium for ubiquitous-joint rock mass[J]. Chinese Journal of Rock Mechanics and Engineering，2009，28(5)：947-955.(in Chinese))
[19]	RUTQVIST J，CHIJIMATSU M，JING L，et al. A numerical study of THM effects on the near-field safety of a hypothetical nuclear waste repository—BMT1 of the DECOVALEX III project. Part 3：Effects of THM coupling in sparsely fractured rocks[J]. International Journal of Rock Mechanics and Mining Sciences，2005，42(5)：745-755. " target="_blank">
[1]	TARON J，ELSWORTH D. Thermal-hydrologic-mechanical-chemical processes in the evolution of engineered geothermal reservoirs[J]. International Journal of Rock Mechanics and Mining Sciences，2009，46(5)：855-864.
[11]	ELSWORTH D，MAI M. Flow-deformation response of dual-porosity media[J]. Journal of Geotechnical Engineering，1992，118(1)：107-124. " target="_blank">
[15]	OWEN D，HINTON E. Finite element in plasticity：theory and practice[M]. Swansea：Pineridge Press Limited，1980：2-31. " target="_blank">
[18]	CHIJIMATSU M，KURIKAMI H，ITO A，et al. Implication of THM coupling on the near-field of a nuclear waste repository in a homogeneous rock mass[R]. [s.l.]：DECOVALES III-Task3-Bench Mark Test 1(BMT1)-Subtask BMT1-B，2002：1-43. " target="_blank">
[2]	RUTQVIST J，TSANG C F. Analysis of thermal-hydrologic- mechanical behavior near an emplacement drift at Yucca Mountain[J]. Journal of Contaminant Hydrology，2003，62-63(4)：637-652. " target="_blank">
[3]	RUTQVIST J，BIRKHOLZER J，CAPPA F，et al. Estimating maximum sustainable injection pressure during geological sequestration of CO2 using coupled fluid flow and geomechanical fault-slip analysis[J]. Energy Conversion and Management，2007，48(6)：1 798-1 807. " target="_blank">
[4]	向阳，向丹，黄大志. 裂缝-孔隙型双重介质应力敏感模拟试验研究[J]. 石油实验地质，2003，25(5)：498-504.(XIANG Yang，XIANG Dan，HUANG Dazhi. Study on the stress sensitivity of permeability in fracture-pore dual media by the full simulation experiment[J]. Petroleum Geology and Experiment，2003，25(5)：498-504.(in Chinese))
[5]	唐春安，马天辉，李连崇，等. 高放废料地质处置中多场耦合作用下的岩石破裂问题[J]. 岩石力学与工程学报，2007，26(增2)：3 932- 3 938.(TANG Chun?an，MA Tianhui，LI Lianchong，et al. Rock failure issues in geological disposal of high-level radioactive wastes under multi-field coupling function[J]. Chinese Journal of Rock Mechanics and Engineering，2007，26(Supp.2)：3 932-3 938.(in Chinese))
[6]	王媛，徐志英，速宝玉. 复杂裂隙岩体渗流与应力弹塑性全耦合分析[J]. 岩石力学与工程学报，2000，19(2)：177-181.(WANG Yuan，XU Zhiying，SU Baoyu. Complete coupled analysis of fluid flow and elastoplastic stress in complicated fractured rock masses[J]. Chinese Journal of Rock Mechanics and Engineering，2000，19(2)：177-181.(in Chinese))
[10]	华若丹. 利用隐伏断层定量预测公式确定断层的延展范围[J]. 江苏煤炭，1996，(4)：41-42.(HUA Ruodan. Using quantitative prediction formula for hidden fault to determine the fault extends[J]. Jiangsu coal，1996，(4)：41-42.(in Chinese))
[16]	张玉军，唐仪兴. 考虑层状岩体强度异向性的地下洞室平面有限元分析[J]. 岩土工程学报，1999，21(3)：307-310.(ZHANG Yujun，TANG Yixing. 2D FEM analysis for an underground opening considering the strength anisotropy of the layered rock mass[J]. Chinese Journal of Geotechnical Engineering，1999，21(3)：307-310. (in Chinese))
[17]	张玉军，刘谊平. 层状岩体抗剪强度的方向性及剪切破坏面的确定[J]. 岩土力学，2001，22(3)：254-257.(ZHANG Yujun，LIU Yiping. Anisotropy of shear strength of layered rocks and determination of shear failure plane[J]. Rock and Soil Mechanics，2001，22(3)：254-257.(in Chinese))