An Evaluation of fracture characteristic for replica specimen casted by granite artificial tensile fracture

Sato, Hisashi; Sawada, Atsushi 

In order to obtain the hydraulic property, mass transport property and three-dimensional fracture void geometry which need for elucidate the permeability and mass transport phenomena in a single fracture, we conducted a flow test, measurement of fracture shape, aperture measurement by optical method, tracer test by optical method for three transparent replica specimens. As a result, the flow rate of two-dimensional seepage flow analysis based on LCL became about 1.5 to 2 times of the flow test results, which results was consistent with previously reported results. To investigate the influence of fracture shape for the flow analysis results, corrected the transmissivity using the acquired data of aperture distribution and fracture shape data. As a results, the fracture permeability by applying the corrected transmissivity considering local slope of the fracture was decreased which is closer to the flow test results.