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Rock Mechanics and Rock Engineering

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01-07-2012 | Technical Note

Quantitative Measurements of Fracture Aperture and Directional Roughness from Rock Cores

Authors: Bryan S. A. Tatone, Giovanni Grasselli

Published in: Rock Mechanics and Rock Engineering | Issue 4/2012

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The hydro-mechanical behavior of a blocky rock mass near the surface and at shallow depths is more dependent on the characteristics of the system of discontinuities within the rock mass than the characteristics of the intact rock. Discontinuities represent planes of weakness and conduits of enhanced hydraulic conductivity relative to the intact rock. The spatial aperture distribution and roughness of these fractures can have a significant influence on their hydro-mechanical behavior. In terms of mechanical behavior, the aperture distribution and roughness directly affect the spatial distribution and inclination of contact areas, which in turn influence the stress distribution, deformation, and asperity damage, under normal and shear loading (e.g., Re and Scavia 1999; Gentier et al. 2000; Grasselli and Egger 2003). In terms of hydraulic behavior, the spatial aperture distribution and roughness directly affect the tortuosity and connectivity of flow paths, which in turn influence the hydraulic transmissivity of the fracture (Zimmerman and Bodvarsson 1996; Berkowitz 2002). …

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Title: Quantitative Measurements of Fracture Aperture and Directional Roughness from Rock Cores
Authors: Bryan S. A. Tatone
Giovanni Grasselli
Publication date: 01-07-2012
Publisher: Springer Vienna
Published in: Rock Mechanics and Rock Engineering / Issue 4/2012
Print ISSN: 0723-2632
Electronic ISSN: 1434-453X
DOI: https://doi.org/10.1007/s00603-011-0219-5

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