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Correlation of Hydraulic Conductivity and Sonic Velocity in Water-Saturated Tuff

by Michito Shimo, Taisei Corp, Yokohama, Japan,



Document Type: Proceeding Paper

Part of: High Level Radioactive Waste Management 1991

Abstract:

A laboratory study was conducted to investigate the correlation of hydraulic and sonic properties of water-saturated tuff. The hydraulic test used a new rock block testing machine, which has the capability of applying biaxial stresses and pore pressure on a 30 cm cubes of rock. The hydraulic conductivity tensor obtained by the cross-hole injection test was clearly anisotropic with principle directions close to those for shear wave velocity. The sensitivity of shear wave velocity to hydraulic conductivity reflects the effect of water bearing voids in retarding the wave propagation. This result suggests that the seismic exploration method may be used for the evaluation of the hydraulic anisotropy of the large volume of rock at the repository site.

Subject Headings: Hydraulic conductivity | Shear waves | Hydraulic properties | Wave velocity | Rock properties | Rock mechanics | Anisotropy | Japan | Asia

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