Natural Rock Fractures: From Aperture to Fluid Flow
نویسندگان
چکیده
Abstract Fractures provide preferential flow paths and establish the internal “plumbing” of rock mass. Fracture surface roughness matedness between surfaces combine to delineate fracture geometric aperture. New published measurements show inherent relation wavelength amplitude. In fact, data cluster along a power trend consistent with fractal topography. Synthetic created using this law, kinematic constraints contact mechanics are used explore evolution aperture size distribution during normal loading shear displacement. Results that increments in stress shift Gaussian toward smaller apertures. On other hand, displacements do not affect unmated fractures; however, mean standard deviation increase displacement initially mated fractures. We demonstrate cubic law is locally valid when follows observed allows for efficient numerical analyses transmissivity. Simulations trajectories redistribute channeling becomes more pronounced increasing stress. Shear induces early anisotropy fractures as points detach transversely direction; decreases become after large displacements. Radial transmissivity obtained torsional ring device gathered from literature support development robust phenomenological models satisfy asymptotic trends. A function accurately captures stress, while logistic represents changes complementary hydro-chemo-mechanical study shows positive feedback reactive fluid heightens channeling.
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ژورنال
عنوان ژورنال: Rock Mechanics and Rock Engineering
سال: 2021
ISSN: ['0723-2632', '1434-453X']
DOI: https://doi.org/10.1007/s00603-021-02565-1