Due to the complexity of the deep environment, a creep model is built and the experimental study is conducted of the shale under the thermal-mechanical-chemical joint actions, and the corresponding mechanisms are investigated. The experimental study reveals that both the temperature and the chemical pH value play a promoting role in the process of creep under this complex environment, and the higher the temperature or the chemical pH value, the larger the instantaneous strain, the creep strain and the creep rate will be, and the longer it will take to reach the steady-state creep stage; the impact of the chemistry pH value on the creep properties of the shale is more significant than that of the temperature. With the method of replacing the conventional linear component with a nonlinear one to describe the nonlinear rheological part, a nonlinear viscoelasto-plastic creep model of the shale under the deep complex environment is built, which agrees well with the actual deep situation and can better simulate the creep properties under the deep complex environment. The model parameters are obtained, and the correctness of the model is verified by comparing the experimental curves with the theoretical ones. This model can be used for the shale creep behavior prediction at various temperatures and pH values within the range discussed in this paper.
WANG Yanchun
,
WANG Yongyan
. Creep Model Establishment and Experimental Study of Shale Under Three Field Deep Environment[J]. Science & Technology Review, 2014
, 32(27)
: 60
-65
.
DOI: 10.3981/j.issn.1000-7857.2014.27.010
[1] 何满潮, 谢和平, 彭苏萍, 等. 深部开采岩体力学研究[J]. 岩石力学与工程学报, 2005, 24(16): 2803-2813. He Manchao, Xie Heping, Peng Suping, et al. Study on rock mechanics in deep mining engineering[J]. Chinese Journal of Rock Mechanics and Engineering, 2005, 24(16): 2803-2813.
[2] 李荣, 孟英峰, 罗勇, 等. 泥页岩三轴蠕变实验及结果应用[J]. 西南石油大学学报, 2007, 29(3): 57-59. Li Rong, Meng Yingfeng, Luo Yong, et al. Triaxial creep experiments and results application of shale[J]. Journal of Southwest Petroleum University, 2007, 29(3): 57-59.
[3] 王永岩, 罗帅, 岳彩虹, 等. 渗流对泥质页岩蠕变规律的影响[J]. 煤矿安全, 2009(1): 85-87. Wang Yongyan, Luo Shuai, Yue Caihong, et al. Study on seepage on creep law effect on shale[J]. Safety in Coal Mine, 2009(1): 85-87.
[4] 王永岩, 魏佳, 齐珺, 等. 深部岩体非线性蠕变变形预测的研究[J]. 煤炭学报, 2005, 30(4): 409-413. Wang Yongyan, Wei Jia, Qi Jun, et al. Study on prediction for nonlinear creep deformation of deep rocks[J]. Journal of China Coal Society, 2005, 30(4): 409-413.
[5] 王永岩, 齐珺, 杨彩虹, 等. 深部岩体非线性蠕变规律[J]. 岩土力学, 2005, 26(1): 117-121. Wang Yongyan, Qi Jun, Yang Caihong, et al. A study of nonlinear creep law in deep rocks[J]. Rock and Soil Mechanics, 2005, 26(1): 117-121.
[6] 李剑光, 王永岩, 王皓. 深部岩体多孔介质流变模型的研究[J]. 岩土力学, 2008, 29(9): 2355-2364. Li Jianguang, Wang Yongyan, Wang Hao. Study of rheological model of porous medium of deep rock[J]. Rock and Soil Mechanics, 2008, 29(9): 2355-2364.
[7] Yang C H, Daemen J J. Temperature effects on creep of tuff and its timedependent damage analysis[J]. International Journal of Rock Mechanics and Mining Sciences, 1997, 34(3/4): 383-384.
[8] 李剑光, 王永岩. 软岩蠕变的温度效应及实验分析[J]. 煤炭学报, 2012, 37(1): 81-85. Li Jianguang, Wang Yongyan. Experimental analysis of temperature effect in creep of soft rock[J]. Journal of China Coal Society, 2012, 37 (1): 81-85.
[9] 胡其志, 冯夏庭, 周辉. 考虑温度损伤的盐岩蠕变本构关系研究[J]. 岩石力学与工程学报, 2009, 30(8): 2245-2248. Hu Qizhi, Feng Xiating, Zhouhui. Study of creep model of rock salt with thermal damage considered[J]. Chinese Journal of Rock Mechanics and Engineering, 2009, 30(8): 2245-2248.
[10] 王永岩, 吕宜美, 肖志娟, 等. 化学腐蚀下砂岩蠕变模型的研究[J]. 煤炭学报, 2010, 35(7): 1095-1098. Wang Yongyan, Lü Yimei, Xiao Zhijuan, et al. Research on sandstone creep models under chemical corrosion[J]. Journal of China Coal Society, 2010, 35(7): 1095-1098.
[11] 崔强. 化学溶液流动-应力耦合作用下砂岩的孔隙结构演化与蠕变特征研究[D]. 沈阳: 东北大学, 2009. Cui Qiang. Study on creep characteristics and the pore structure of sandstone evolution of chemical solution flow-stress coupling effect[D]. Shenyang: Northeastern University, 2009.
[12] 吕宜美. 化学腐蚀对深部软岩蠕变特性的影响研究[D]. 青岛: 青岛科技大学, 2010. Lü Yimei. Research on the effects of chemical erosion on creep of deep soft rock[D]. Qingdao: Qingdao University of Science and Technology, 2010.
