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- W2017338733 abstract "Abstract The permeability was measured of three samples of Chelmsford granite cored in mutually perpendicular directions, while varying the conditions of confining pressure P c and pore pressure P p . At intervals along the prssure path “local” values of the coefficient α of the effective pressure law ( P eff = P c − αP p ) were calculated. The values of α ranged between 0.6 and 0.7 for the three samples, showing almost no directional effect in Chelmsford granite. Similar procedures were applied on two samples of Barre granite. The measurements were made while decreasing P c (unloading) as well as increasing P c (loading). Large hysteresis in permeability was observed, and α was found strongly stress-history dependent (or path dependent). A simple model based on frictional sliding inside the rock seems to explain well these observations. Also, the data suggest a decrease of α with increasing confining pressure in both rocks. This can be interpreted in terms of changes in the geometry of the cracks during closure." @default.
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- W2017338733 date "1986-06-01" @default.
- W2017338733 modified "2023-10-13" @default.
- W2017338733 title "The effective pressure law for permeability in Chelmsford granite and Barre granite" @default.
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- W2017338733 doi "https://doi.org/10.1016/0148-9062(86)90972-1" @default.
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