岩石与水相互作用的能量原理和Biot系数

岩石与水相互作用的研究不仅在理论上而且在工程实践上具有重大的作用，大量的注水采油工程、核废料贮存等就是利用岩石的各向异性和其水力学特征，同时，水又时常引起岩石和土体滑坡坍塌等自然灾害。在微观分析基础上，从理论上建立了各向异性损伤岩石的能量原理及相应的各向异性Biot系数基本方程；并以红砂岩为例，运用两种不同试验方法获取各向同性Biot系数；以三轴注水、排水等试验，论证了在应力-应变全过程曲线中，Biot系数具有各向异性损伤特征。这种特性对注水和注浆等岩土工程具有重要的指导意义。

Energy principle of rock and water interaction and Biot coefficient

The study of rock and water interaction is very important for not only on the theory but also on the engineering practice; the anisotropic characteristics and hydraulic properties of rock mass is used in oil exploitation, radioactive waste storage etc; and then the hazards are often from the water softening,. Based on the microscopic analyses, the energy principle of anisotropic damage and fundamental equation of Biot’s coefficient are established; the two testing methods of obtained isotropic Biot’s coefficient are proposed. They are proved to be available to determinate the Biot’s parameter by sand laboratory, and anisotropy of Biot’s coefficient is also proved by the stress-strain complete process curve of triaxial compressive tests with injecting and drainage. The anisotropy of Biot’s coefficient is very important for injecting and grouting in civil engineering.