Analysis of the Deformation of Saturated Porous Rocks in Compression.

摘要

An investigation of the mechanical influence of interstitial fluids on the deformation process of saturated rocks has been conducted to determine the domain of validity of previously published theories. Equilibrium equations for fluid saturated materials in which the fluid is at rest or flows according to DARCY's law were derived. For this purpose, a new characterization of porosity has been proposed for analyzing porosity variation within a rock mass. This derivation indicates that the bulk material (solid plus fluid) can be represented by an equivalent homogeneous continuum for which the mass density and the stress tensor at any point depend upon average stresses and average densities of both the solid matrix and the saturating fluid as well as upon the surface and the volume porosity.