Abstract
An evaluation method of hydraulic properties was proposed in an area of rock masses from meters to tens of meters. Hydraulic conductivity and porosity between pressurized and observed point in several boreholes were determined by inverse analysis of pressure changes at observed point using pressure changes at pressurized point. This new method has two features; 1) hydraulic parameters can be estimated using analytical solution of pressure diffusion with variable flowrate, and 2) variety pressure changes of pressurized point are acceptable because they are treated as discrete data. Hydraulic properties around underground rock cavern evaluated by an application of this method to field data were largely consistent with results of in-situ tests.
