Investigation on mechanical parameters of water-rock interaction

【Author】

Yingfa Lu & Tao Lu Key Laboratory of Geological Hazards on Three gorges Reservoir Area,Ministry of Education, China Three Gorges University,Yichang,Hubei,China

【Abstract】

<正>The processes are very complex for the coupling of water-rock interaction,and the sensitivity of water for porous media material cracks should be focused for the research of fundamental mechanical properties of rocks. In the present research,the theories and measure technologies of conventional true and pseudo tri-axial tests are also analyzed;the mechanical parameters are obtained by true and pseudo tri-axial tests with/without water pressures. The idea that the tri-axial test is only suitable for the isotropic porous media materials is proposed,the sample of 50 mm×50 mm×100 mm is proposed to conduct the triaxial test to understand the anisotropic mechanical behaviors of porous media materials.Based on the researches of theory and test,some results are obtained for the different sample shape and testing method.The five mechanical parameters (E_(11),E_(22),μ_(12),μ_(23),μ_(31)) are obtained for the true tri-axial test under both saturated and dry condition,the nine mechanical parameters(E_(11),E_(22),μ_(12),μ_(23),μ_(31)β_(11)~e,β_(22)~e,β_(33)~e),K_s)can be gotten for the true tri-axial test with water pressure, the two mechanical parameters((E_(11),μ_(12),μ_(31)) are obtain for the pseudo tri-axial test under saturated(without water pressure) or dry porous media condition with a cylindrical sample. The five mechanical parameters((E_(11),μ_(12),β_(11)~e,β_(22)~e,K_s) can be obtained for the pseudo tri-axial test with water pressure, and the three mechanical parameters((E_(11),μ_(12),μ_(31)) can be obtained for the pseudo tri-axial test with hexahedral sample without water pressure,and the seven mechanical parameters ((E_(11),μ_(12),μ_(31),β_(11)~e,β_(22)~e,β_(33)~e),K_s) can be obtained for the pseudo tri-axial test using hexahedral sample with water pressure. Finally,the pseudo tri-axial test with cylindrical sample is only fit for the isotropic porous media,and the test with hexahedral sample is fit for the anisotropic porous media mechanical behaviors.

【Keywords】

rock mechanics;;water-rock interaction;;true/pseudo tri-axial tests;;limit yield stress;;anisotropic Biot coefficient;;action mechanism

References

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Total: 18 articles

  • [1] Ge Hongkui 1, Han Dehua 2, Chen Yong 3 ( 1 Department of Petroleum Engineering, University of Petroleum, Dongying 257061 China) ( 2 Houston Advanced Research Center, The Woodlands 77381 USA) ( 3 China Seismological Bureau, Beijing 10003, EXPERIMENTAL INVESTIGATION ON POROELASTICITY OF SANDSTONES, Chinese Journal of Rock Mechanics and Engineering,
  • [2] LU Ying-fa1,ZHENG Jun-jie1,CHAI Hua-you2 (1. School of Civil Engineering and Mechanics,Huazhong University of Science and Technology,Wuhan 430074,China; 2. Institute of Rock and Soil Mechanics,Chinese Academy of Sciences,Wuhan 430071,China), CHARACTERISTICS OF SKEMPTON COEFFICIENT OF REPRESENTATIVE ROCK AND SOIL, Chinese Journal of Rock Mechanics and Engineering,
  • [3] LU Yingfa1,2,LIU Defu1,WU Yanchun2,SHAO Jianfu3(1.Key Laboratory of Geological Hazards on Three Gorges Reservoir Area,Ministry of Education,China Three Gorges University,Yichang,Hubei 443002,China;2.College of Civil Engineering and Mechanics,Huazhong University of Science and Technology,Wuhan,Hubei 430074,China;3.Department of Civil Engineering,University of Sciences and Technologies of Lille,Lille,59655,France), NUMERICAL SIMULATION OF ORTHOTROPIC ANISOTROPIC DAMAGE CONSIDERING ROCK-WATER INTERACTION, Chinese Journal of Rock Mechanics and Engineering,
  • [4] *LI Shun-cai1 , MIAO Xie-xing2 , CHEN Zhan-qing2 , MAO Xian-biao2 (1. School of Mechanical and Electrical Engineering, Xuzhou Normal University, Xuzhou, Jiangsu 221116, China; 2. School of Science, China University of Mining & Technology, Xuzhou, Jiangsu 221008, China), EXPERIMENTAL STUDY ON SEEPAGE PROPERTIES OF NON-DARCY FLOW IN CONFINED BROKEN ROCKS, Engineering Mechanics,

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