Abstract
Rock fractures have both conductive areas and impermeable obstacles, where the two rock surfaces are in contact. This paper aims at a better understanding of the effect of contact obstacles on fluid flow. Finite element simulations through rock fractures with conductive and contact areas were conducted to test validity of the theoretical equation. The contact correction term (1–2c) was modified to (1–2.4c), yielding better estimates when compared with measured hydraulic apertures, especially at a high fractional contact area. The modified correction term (1–2.4c) reflects a strong impact on fluid flow at high fractional contact areas. As some void areas surrounded by contact regions do not contribute to fluid flow, incorporation of these areas into contact areas leads to the better calculation of fluid flow through rough fractures with contact obstacles.
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References
Brown, S.R., 1987, Fluid flow through rock joints: the effect of surface roughness. Journal of Geophysical Research, 92, 1337–1347.
Gale, J., MacLeod, R. and Le Messurier, P., 1990, Site characterization and validation-Measurement of flowrate, solute velocites and aperture variation in natural fractures as a function of normal and shear stress, stage 3. Stripa Project Report 90–11, Swedish Nuclear Fuel and Waste Management Company, Stockholm.
Hakami, E., 1995. Aperture Distribution of Rock Fractures. Ph.D. thesis, Royal Institute of Technology, Stockholm, Sweden.
IDRISI, Clark Labs, Clark University, Worcester, MA 01610-1477, USA.
Iwai, K., 1976. Fundamental Studies of Fluid Flow through a Single Fracture. Ph.D. thesis, University of California, Berkeley.
Kirkpatrick, S., 1973. Percolation and conduction. Reviews of Modern Physics, 45, 574–588.
Obdam, A.N.M. and Veling, E.J.M., 1987, Elliptical inhomogeneities in groundwater flow- an analytical description. Journal of Hydrology, 95, 87–96
Piggott, A.R. and Elsworth, D., 1992, Analytical models for flow through obstructed domains. Journal of Geophysical Research, 97, 2085–2093.
Pyrak-Nolte, L.J., Myer, L.R., Cook, N.G.W. and Witherspoon, P.A., 1987, Hydraulic and mechanical properties of natural fractures in low permeability rock. The 6th International Congress of Rock Mechanics, 225–231.
Walsh, J.B., 1981, Effect of pore pressure and confining pressure on fracture permeability. International Journal of Rock Mechanics and Mining Sciences, 18, 429–435.
Witherspoon, P.A., Wang, J.S.Y., Iwai, K., and Gale, J.E., 1980, Validity of cubic law for fluid flow in a deformable rock fracture. Water Resources Research 16, 1016–1024.
Yeo, I.W., de Freitas, M.H. and Zimmerman, R.W., 1998, Effect of shear displacement on the aperture and permeability of a rock fracture. International Journal of Rock Mechanics and Mining Sciences, 35, 1051–1070.
Zimmerman, R.W., Chen, D.-W. and Cook, N.G.W., 1992, The effect of contact area on the permeability of fractures. Journal of Hydrology, 139, 79–96.
Zimmerman, R.W. and Bodvarsson, G.S., 1996, Hydraulic conductivity of rock fractures. Transport in Porous Media, 23, 1–30.
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Yeo, W. Effect of contact obstacles on fluid flow in rock fractures. Geosci J 5, 139–143 (2001). https://doi.org/10.1007/BF02910418
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DOI: https://doi.org/10.1007/BF02910418