砂岩的变形各向异性

ANISOTROPIC DEFORMATION OF SANDSTONE

本文从广义虎克定律出发，推出了横观各向同性介质波传播速度依赖于传播方向与其对称轴Ｚ之间的夹角θ并随θ角成椭圆规律变化的结论，据此测取砂岩不同方向的Ｖ、ｖ、Ｅ等值与横观各向同性理论预估结果十分吻合，亦遵循近似椭圆规律变化。文中对砂岩呈现的这种各向异性在工程和找矿中带来的影响进行了讨论。

Based on the generalized Hooker's law,the result is obtained that the velocity of thewave intraversely isotropic medium changes with the angle θ between the wave propagating direction and symmetry coordinate Z. It is also got that the changing pattern of wavepropagating velocity with the angle θ follows the law of ellipse. From this,V,v,E in different directions in sandstone are obtained.The measured results are in accordance withthe traversely isotropic theory,they all approximately follow the law of ellipse,The effects brought by the anisotropy of the rock in both engineering and prospecting are dis-cussed.