Determining anisotropic hydraulic conductivity in fractured rocks based on single-borehole slug tests

The technology of the segmented slug tests in a single borehole was developed based on the theory of slug test and the expression of hydraulic conductivity tensor. A set of test equipment, comprising of a multi- functional probe, a seal valve, an operating screen and a pneumatic pump, etc. and capable of capturing the borehole image, the fracture orientation, the water pressure and the temperature and transmitting the data to the data collection system on the ground was developed. A program was written to calculate the hydraulic conductivity of fissures and the hydraulic conductivity tensor of rock mass, and specific water storage in fractured rock based on the data of single-borehole slug tests. A single-borehole slug test was carried out in site and the corresponding methods for determining the hydraulic conductivity tensor were described in detail. ©, 2015, Academia Sinica. All right reserved.