Abstract
For quantitative evaluation of the effect Non-Darcy flow in Lugeon test, a comprehensive numerical model is proposed. The developed model depends on two dimension radial flow equation. It includes hydrodynamic phenomena, such as condition around borehole and discharge flow. From the experimental Lugeon-test results in the saturated condition, permeability (K) and Non-Darcy coefficients (b) were determined by simultaneous inversion. The calculated P-Q curves were reasonable and consistent with in-suite P-Q curves. This method is cheaper and faster than traditional ones. According to this method, b has various values as a crack increases. Lugeon value (permeability) converted into laminar flow is also more affected by Non-Darcy effect.
