基于细观力学的脆性岩石长期蠕变失效研究

doi:10.13722/j.cnki.jrme.2014.1496

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摘要蠕变特性是评价岩石长期失效特性的重要依据。基于岩石细观力学模型及裂纹扩展法则，结合细观裂纹长度与宏观应变定义损伤之间的联系，建立细观裂纹扩展与宏观应变之间的关系，并给出岩石的应力–应变关系及三级蠕变演化表达式。研究岩石渐进失效过程中不同围压下的应力–应变关系，并分析分级加载下的蠕变演化规律，其结果与试验结果吻合较好，验证了提出的细观模型的合理性。然后，对不同常应力状态下的蠕变失效时间与稳态蠕变率进行研究，其结果对高地应力下地下支护结构的设计及服役寿命的评估具有重要指导意义。

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	邵珠山
	李晓照

关键词 ：岩石力学, 脆性岩石, 亚临界裂纹扩展, 分级加载, 蠕变, 损伤

Abstract：Creep property is an important basis for evaluating long-term failure of rocks. Based on the model of micromechanics and law of crack growth in brittle rocks，combining the definition of damage in micromechanical and macroscopic scale，the linkage between microcrack growth and macroscopic strain is established，and the theoretical expression of stress-strain relationship and three independent stages of creep are derived. Relationships between stress and strain under different confining pressures are studied and the creep properties under step axial loading are analyzed，which both agree well with the experimental results. The rationality of micromechanical model is verified by the experimental results. The creep failure time and steady-state creep rate are studied at different constant stress states，which provides the important help for the evaluation of service life and design of underground structure under high geostatic stresses.

Key words： rock mechanics brittle rock subcritical crack growth step loading creep damage

引用本文:

邵珠山，李晓照. 基于细观力学的脆性岩石长期蠕变失效研究[J]. 岩石力学与工程学报, 2016, 35(S1): 2644-2652.
SHAO Zhushan，LI Xiaozhao. Research on long-term creep failure of brittle rock based on micromechanics. , 2016, 35(S1): 2644-2652.

链接本文:

https://rockmech.whrsm.ac.cn/CN/10.13722/j.cnki.jrme.2014.1496 或 https://rockmech.whrsm.ac.cn/CN/Y2016/V35/IS1/2644

[1]	张明，毕忠伟，杨强，等. 锦屏一级水电站大理岩蠕变试验与流变模型选择[J]. 岩石力学与工程学报，2010，29(8)：1530-1537.(ZHANG Ming，BI Zhongwei，YANG Qiang，et al. Creep test and rheological model selection of marble of Jinping I hydropower station[J]. Chinese Journal of Rock Mechanics and Engineering，2010，29(8)：1530-1537.(in Chinese))
[2]	潘鹏志，冯夏庭，申林方，等. 裂隙花岗岩各向异性蠕变特性研究[J]. 岩石力学与工程学报，2011，30(1)：36-44.(PAN Pengzhi，FENG Xiating，SHEN Linfang，et al. Study of anisotropic creep behavior of fractured granite[J]. Chinese Journal of Rock Mechanics and Engineering，2011，30(1)：36-44.(in Chinese))
[3]	佘成学，崔旋. 高孔隙水压力对岩石蠕变特性的影响[J]. 岩石力学与工程学报，2010，29(8)：1603-1609.(SHE Chengxue，CUI Xuan. Influence of high pore water pressure on creep properties of rock[J]. Chinese Journal of Rock Mechanics and Engineering，2010，29(8)：1603-1609.(in Chinese))
[4]	沈明荣，谌洪菊. 红砂岩长期强度特性的试验研究[J].岩土力学，2011，32(11)：3301-3305.(SHEN Mingrong，CHEN Hongju.Testing study of long-term strength characteristics of red sandstone[J].Rock and Soil Mechanics，2011，32(11)：3301-3305.(in Chinese))
[5]	孙钧，凌建明. 三峡船闸高边坡岩体的细观损伤及长期稳定性研究[J]. 岩石力学与工程学报，1997，16(1)：1-7.(SUN Jun，LING Jianming. On meso damage behaviour and long-term stability of high slope rock of the three gorges shiplocks[J]. Chinese Journal of Rock Mechanics and Engineering，1997，16(1)：1-7.(in Chinese))
[6]	张强勇，杨文东，陈芳，等. 硬脆性岩石的流变长期强度及细观破裂机制分析研究[J]. 岩土工程学报，2011，33(12)：1910-1918. (ZHANG Qiangyong，YANG Wendong，CHEN Fang，et al. Long-term strength and microscopic failure mechanism of hard brittle rocks[J]. Chinese Journal of Geotechnical Engineering，2011，33(12)：1910- 1918.(in Chinese))
[7]	MIURA K，OKUI Y，HORII H. Micromechanics-based prediction of creep failure of hard rock for long-term safety of high-level radioactive waste disposal system[J]. Mechanics of Materials，2003，35(3)：587-601.
[8]	NARA Y，YAMANAKA H，OE Y，et al. Influence of temperature and water on subcritical crack growth parameters and long-term strength for igneous rocks[J]. Geophysical Journal International，2013，193(1)：47-60.
[9]	LOCKNER D，BYERLEE J. Acoustic emission and creep in rock at high confining pressure and differential stress[J]. Bulletin of the Seismological Society of America，1977，67(2)：247-258.
[10]	OHNAKA M. Acoustic emission during creep of brittle rock[J]. International Journal of Rock Mechanics and Mining Sciences and Geomechanics Abstracts，1983，20(3)：121-134.
[11]	任建喜. 单轴压缩岩石蠕变损伤扩展细观机制CT实时试验[J]. 水利学报，2002，(1)：10-15.(REN Jianxi. CT real-time testing on meso-mechanism of creep damage propagation in rock under uniaxial compression[J]. Journal of Hydraulic Engineering，2002，(1)：10-15.(in Chinese))
[12]	GOLSHANI A，ODA M，OKUI Y，et al. Numerical simulation of the excavation damaged zone around an opening in brittle rock[J]. International Journal of Rock Mechanics andMining Sciences，2007，44(6)：835-845.
[13]	SHAO J F，CHAU K T，FENG X T. Modeling of anisotropic damage and creep deformation in brittle rocks[J]. International Journal of Rock Mechanics andMining Sciences，2006，43(4)：582-592.
[14]	ASHBY M F，HALLAM S D. The failure of brittle solids containing small cracks under compressive stress states[J]. Acta Metall，1986，34(3)：497-510.
[15]	ASHBY MF，SAMMIS CG. The damage mechanics of brittle solids in compression[J]. Pure and Applied Geophysics，1990，133(3)：489-521.
[16]	ATKINSON B K. Subcritical crack growth in geological materials[J]. J Geophys Res，1984，89(B6)：4077-4114.
[17]	KACHANOV M L. A microcrack model of rock inelasticity[J]. Mechanics of Materials，1982，(1)：29-41.
[18]	BRANTUT N，BAUD P，HEAP M J，et al. Micromechanics of brittle creep in rocks[J]. Journal of Geophysical Research，2012，117：B08412.
[19]	万琳辉，曹平，黄永恒，等. 水对岩石亚临界裂纹扩展及门槛值的影响研究[J]. 岩土力学，2010，31(9)：2737-2742.(WAN Linhui，CAO Ping，HUANG Yongheng，et al. Study of subcritical crack growth of rocks and threshold values in different environments[J]. Rock and Soil Mechanics，2010，31(9)：2737-2742.(in Chinese))
[20]	伍国军，陈卫忠，曹俊杰，等. 工程岩体非线性蠕变损伤力学模型及其应用[J]. 岩石力学与工程学报，2010，29(6)：1184-1191.(WU Guojun，CHEN Weizhong，CAO Junjie，et al. Nonlinear creep damage model of engineered rock and its application[J]. Chinese Journal of Rock Mechanics and Engineering，2010，29(6)：1184-1191.(in Chinese))
[21]	刘宁，张春生，褚卫江. 锦屏深埋大理岩破裂扩展的时间效应试验及特征研究[J]. 岩土力学，2012，33(8)：2437-2450.(LIU Ning，ZHANG Chunsheng，CHU Weijiang. Experimental research on time-dependent behavior of crack propagation in Jinping deep marble[J]. Rock and Soil Mechanics，2012，33(8)：2437-2450.(in Chinese))
[22]	汪斌，朱杰兵，邬爱清，等. 锦屏大理岩加、卸载应力路径下力学性质试验研究[J]. 岩石力学与工程学报，2008，27(10)：2138-2145.(WANG Bin，ZHU Jiebing，WU Aiqing，et al. Experimental study on mechanical properties of Jinping marble under loading and unloading stress paths[J]. Chinese Journal of Rock Mechanics and Engineering，2008，27(10)：2138-2145.(in Chinese))
[23]	BHAT H S，SAMMIS C G，ROSAKIS A J. The micromechanics of Westerly granite at large compressive loads[J]. Pure and Applied Geophysics，2011，168(12)：1-18.
[24]	MARTIN C D，CHANDLER N A. The progressive fracture of Lac du Bonnet granite[J]. International Journal of Rock Mechanics and Mining Sciences and Geomechanics Abstracts，1994，31(6)：643-659.