A FIELD TEST METHOD FOR DETERMINING PERMEABILITY PARAMETERS OF GENTLY DIPPING STRUCTURAL FACE IN ROCKMASS

Based on the principal law of seepage flow, considering the possibility of field test, a new field test method is proposed in this paper for determining the permeability parameters of gently dipping structural face or discontinuity. Firstly, a formula of the permeability parameters of gently dipping is deduced. Secondly, a simple water injection test was carried out in the hole penetrating typical structural faces or discontinuities by pneumatic drilling, then the permeability parameters of them were obtained. As an illustrative example, the Xiluodu Hydropower Station is presented and discussed.