Numerical simulations of radon diffusion-seepage in single fracture of rock.

The joint roughness coefficient (JRC) of rock fractures significantly effects their seepage characteristics, which is critical in radon diffusion-seepage studies. It is worthwhile to investigate how to accurately characterize the rock fracture roughness and its effect on radon diffusion-seepage patterns within fractured porous media. In this study, the roughness of single-fracture rock is thoroughly considered and described by the Barton curve.