| 孔隙水压力对岩石力学参数的影响 |
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| 引用本文： | 刘琦,卢耀如,李晓昭.孔隙水压力对岩石力学参数的影响[J].地球学报,2008,29(5):660-664. |
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| 作者姓名： | 刘琦 卢耀如 李晓昭 |
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| 作者单位： | 同济大学地下建筑与工程系，上海200092;中国地质科学院水文地质环境地质研究所，河北石家庄050061;南京大学地球科学系，江苏南京210093 |
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| 基金项目： | 国家自然科学基金项目(编号:40572144) |
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| 摘 要： | 多孔多相的岩石介质中,孔隙水压力的变化会引起岩石的变形,其力学参数随之改变,而岩石的力学参数变化反过来会引起渗流场发生改变。本文利用岩石力学参数在其中的作用,推导出孔隙水压力变化时,岩石变形与孔隙度、压缩系数和体积弹性模量间的关系式。通过理论计算与分析表明,在渗流场和变形场的非线性程度不很高,参数关系不是很复杂的情况下,利用岩石力学参数的更新来进行耦合分析的方法,对于近期工程应用行之有效。
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| 关 键 词： | 孔隙压力 流固耦合 孔隙度 渗透率 体积弹性模量 |
The Effect of the Pore Water Pressure on the Rock Mechanics Parameters |
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| LIU Qi,LU Yao-ru and LI Xiao-zhao.The Effect of the Pore Water Pressure on the Rock Mechanics Parameters[J].Acta Geoscientia Sinica,2008,29(5):660-664. |
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| Authors: | LIU Qi LU Yao-ru and LI Xiao-zhao |
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| Institution: | Department of Geotechnical Engineering, Tongji University, Shanghai 200092;Institute of Hydrogeology and Environmental Geology, CAGS, Shijiazhuang, Hebei 050061;Department of Earth Sciences, Nanjing University, Nanjing, Jiangsu 210093 |
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| Abstract: | In multi-phase porous rock media, the change of pore water pressure will induce the deformation of rocks and the variation of rock mechanics parameters, which, in turn, will change the seepage flow field. Using the rock mechanics parameters, this paper deduces the relationships of deformation, porosity, coefficients of compressibility and bulk elastic modulus during the variation of the pore water pressure. Theoretical calculation and analysis show that it is effective to use couple analysis by means of renovated rock mechanics parameters when the seepage flow field and deformation field are given. |
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| Keywords: | pore pressure fluid-solid coupling porosity permeability bulk elastic modulus |
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