ABSTRACT
The radioactive nuclear waste disposal particularly receives great attention in the field of geoengineering. Rock masses in nature contain pores within the intact rock and discontinuities with apertures of different sizes. One of the approaches to deal with such rock masses is to treat them as multiphase materials. The theory of mixtures describes the behaviour of multiphase media by considering the effects of interaction between the constituents that make up the whole system. The theory of elastic wave propagation in a fluid-saturated porous solid was first developed by M. A. Biot in 1956 after his study on three dimensional consolidation in which he had established the equations governing the interaction of the solid and fluid media for quasi-static phenomena. Governing equations derived in previous section were discretized in physical space by applying Galerkin-type finite element method, together with the use of 4-noded iso-parametric elements for pressure and temperature and 9-noded iso-parametric element for displacement.
