基于改进西原模型的不同含水率砂岩蠕变实验及理论研究

doi:10.13722/j.cnki.jrme.2021.0302

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Abstract In order to study the influence of the long-term strength change on the stability of the surrounding rock in deep roadways under the action of groundwater. The sandstone in Wanfu Coal Mine was taken as the main research object，and uniaxial compression test and uniaxial creep test were carried out with different moisture contents. It is found that the water content has an obvious softening effect on the rock strength and long-term strength. According to the viscoelastic strain law of isochronal creep curve，a viscoelastic modulus was proposed，and the nonlinear softening laws of the viscoelastic modulus and the elastic modulus with the water content were obtained. A new nonlinear viscous dashpot element that can describe the accelerated creep behavior was proposed，by which an improved Nishihara model was developed based on the combination of the damage theory and the experimental results. The model was used to identify the parameters of the creep experiment results，and it is shown that the model has a good fitting effect on the experimental results，which means the model can better describe the mechanical behavior of each stage of creep. At the same time，it is found that the damage creep model parameters ，， have little difference under the same stress，and each parameter is affected by the creep stress. Specifically，has a linear relationship with ，while and have a negative exponential relationship with . Therefore，the creep state of rock can be reasonably analyzed according to the moisture content and different stress levels. Combined with the new long-term creep strength discrimination method，the developed model can provide a basis for the long-term stable use of roadways and the advance prediction of creep failure of roadways.

Key words： rock mechanics rock creep water absorption damage accelerated creep Nishihara model

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	Articles by authors
	SUN Xiaoming1
	2
	MIAO Chengyu1
	2
	JIANG Ming1
	2
	ZHANG Yong1
	2
	YANG Liu1
	2
	GUO Bo1
	2

Cite this article:

SUN Xiaoming1,2,MIAO Chengyu1, et al. Experimental and theoretical study on creep behaviors of sandstone with different moisture contents based on modified Nishihara model[J]. , 2021, 40(12): 2411-2420.

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http://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2021.0302 OR http://rockmech.whrsm.ac.cn/EN/Y2021/V40/I12/2411

[18]	BARBERO E J. Finite element analysis of composite materials with Abaqus[M]. [S. l.]：CRC Press，2013：251-252.
[2]	孙钧. 岩石流变力学及其工程应用研究的若干进展[J]. 岩石力学与工程学报，2007，26(6)：1 081-1 106.(SUN Jun. Rock rheological mechanics and its advance in engineering application[J]. Chinese Journal of Rock Mechanics and Engineering，2007，26(6)：1 081-1 106. (in Chinese))
[4]	FUJII Y，KIYAMA T. Circumferential strain behavior during creep tests of brittle rocks[J]. International Journal of Rock Mechanics and Mining Sciences，1999，36(3)：323-337.
[7]	曹平，郑欣平，李娜，等. 深部斜长角闪岩流变试验及模型硏究[J]. 岩石力学与工程学报，2012，31(增1)：3 015-3 021.(CAO Ping，ZHENG Xinping，LI Na，et al. Experiment and model study of rheological characteristics for deep amphibolite[J]. Chinese Journal of Rock Mechanics and Engineering，2012，31(Supp.1)：3 015-3 021. (in Chinese))
[9]	蒋玄苇，陈从新，夏开宗，等. 石膏矿岩三轴压缩蠕变特性试验硏究[J]. 岩土力学，2016，37(增1)：301-308.(JIANG Xuanwei，CHEN Congxin，XIA Kaizong，et al. Experimental study of creep characteristics of gypsum mine rock in triaxial compression[J]. Rock and Soil Mechanics，2016，37(Supp.1)：301-308.(in Chinese))
[11]	宋勇军，雷胜友，邹翀，等. 干燥与饱水状态下炭质板岩蠕变特性研究[J]. 地下空间与工程学报，2015，47(3)：619-664.(SONG Yongjun，LEI Shengyou，ZOU Chong，et al. Study on creep characteristics of carbonaceous slates under dry and saturated states[J]. Chinese Journal of Underground Space and Engineering，2015，47(3)：619-664.(in Chinese))
[13]	于超云. 水对岩石力学性质影响的试验及数值模拟研究[博士学位论文][D]. 大连：大连理工大学，2019.(YU Yunchao. Experimental study and numerical simulation on the effect of water on rock mechanical properties[Ph. D. Thesis][D]. Dalian：Dalian University of Technology，2019.(in Chinese))
[15]	齐亚静，姜清辉，王志俭，等. 改进西原模型的三维蠕变本构方程及其参数辨识[J]. 岩石力学与工程学报，2012，31(2)：347-355.(QI Yajing，JIANG Qinghui，WANG Zhijian，et al. 3D creep constitutive equation of modified Nishihara model and its parameters identification[J]. Chinese Journal of Rock Mechanics and Engineering，2012，31(2)：347-355.(in Chinese))
[16]	WANG X，HUANG Q，LIAN B，et al. Modified Nishihara rheological model considering the effect of thermal-mechanical coupling and its experimental verification[J]. Advances in Materials Science and Engineering，2018，(2018)：1-9.
[3]	陈宗基，康文法. 岩石的封闭应力、蠕变和扩容及本构方程[J]. 岩石力学与工程学报，1991，10(4)：299-312.(TNA Tjongkie，KANG Wenfa. On the locked in stress，creep and dilatation of rocks and the constitutive equations[J]. Chinese Journal of Rock Mechanics and Engineering，1991，10(4)：299-312.(in Chinese))
[14]	徐卫亚，杨圣奇. 节理岩石剪切流变特性试验与模型研究[J]. 岩石力学与工程学报，2005，24(增2)：5 536-5 542.(XU Weiya，YANG Shengqi. Experiment and modeling investigation on shear rheological property of joint rock[J]. Chinese Journal of Rock Mechanics and Engineering，2005，24(Supp.2)：5 536-5 542.(in Chinese))
[10]	黄明. 含水泥质粉砂岩蠕变特性及其在软岩隧道稳定性分析中的应用研究[博士学位论文][D]. 重庆：重庆大学，2010.(HUANG Ming. Study on the creep properties of waterbearing siltite and its application in soft rock tunnel engineering[Ph. D. Thesis][D]. Chongqing：Chongqing University，2010.(in Chinese))
[8]	孙琦，张淑坤，卫星，等. 考虑煤柱黏弹塑性流变的煤柱-顶板力学模型[J]. 安全与环境学报，2015，15(2)：88-91.(SUN Qi，ZHANG Shukun，WEI Xing，et al. Mechanic model for the gobpillar-roof inview of fore casting its visco elasto plastic reclogical deformation[J]. Journal of Safety and Environment，2015，15(2)：88-91.(in Chinese))
[5]	缪协兴，陈至达. 岩石材料的一种蠕变损伤方程[J]. 固体力学学报，1995，16(4)：343-346.(MIAO Xiexing，CHEN Zhida. A creep damage equation for rocks[J]. Acta Mechanica Solida Sinica，1995，16(4)：343-346.(in Chinese))
[6]	蔡美峰. 岩石力学与工程[M]. 北京：科学出版社，2002：198-217.(CAI Meifeng. Rock mechanics and engineering[M]. Beijing：Science Press，2002：198-217.(in Chinese))
[1]	张向东，李永靖，张树光，等. 软岩蠕变理论及其工程应用[J]. 岩石力学与工程学报，2004，23(10)：1 635-1 639.(ZHANG Xiangdong，LI Yongjing，ZHANG Shuguang，et al. Creep theory of soft rock and its engineering application[J]. Chinese Journal of Rock Mechanics and Engineering，2004，23(10)：1 635-1 639.(in Chinese))
[12]	杨秀荣，姜谙男，江宗斌，等. 含水状态下软岩蠕变试验及损伤模型研究[J]. 岩土力学，2018，39(增1)：167-174.(YANG Xiurong，JIANG Annan，JIANG Zongbin，et al. Creep test and damage model of soft rock under watercontaining condition[J]. Rock and Soil Mechanics，2018，39(Supp.1)：167-174.(in Chinese))
[17]	刘雄. 岩石流变学概论[M]. 北京：地质出版社，1994：126-133.(LIU Xiong. Introduction to rock rheology[M]. Beijing：Geological Publishing House，1994：126-133.(in Chinese))