Explicit modeling of dilation, asperity degradation and cyclic seating of rock joints

Dowding, Charles H.; Zubelewicz, Aleksander; O’Connor, Kevin; Belytschko, Ted

doi:10.1016/0266-352x(91)90020-g

Cited by 11 publications

(1 citation statement)

References 13 publications

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“…The shear characteristic of rock fractures influenced by a large extent on several phenomena and many effective factors including wall strength and weathering state [ Barton , ; Bandis et al ., ], boundary conditions and normal stresses [ Haberfield and Johnston , ; Haberfield and Seidel , ; Haque , ; Jiang et al ., ; Leichnitz , ; Pereira and de Freitas , ; Saeb and Amadei , ; Seidel and Haberfield , ; Sun et al ., ], time [ Dieterich , ; Ruina , ], deformation history [ Babanouri et al ., ; Belem et al ., ; Boulon et al ., ; Chern et al ., ; Dowding et al ., ; Huang et al ., ], fracture geometry and roughness [ Archambault et al ., ; Barton , ; Barton et al ., ; Gentier et al ., ; Goodman , ; Grasselli et al ., ; Huang et al ., ; Karami and Stead , ; Kwafniewski and Wang , ; Lopez et al ., ; Park and Song , ; Zhang et al ., ; Zhao , ], shear direction [ Jing et al ., ], and scale [ Bandis et al .,1981; Barton and Bandis , ; Barton et al ., ]. From these, fracture geometry and surface roughness play a key role in the shear characteristic of rock fractures.…”

Section: Theory and Backgroundmentioning

confidence: 99%

Critical Reynolds number for nonlinear flow through rough-walled fractures: The role of shear processes

et al. 2014

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This paper experimentally investigates the role of shear processes on the variation of critical Reynolds number and nonlinear flow through rough-walled rock fractures. A quantitative criterion was developed to quantify the onset of nonlinear flow by comprehensive combination of Forchheimer's law and Reynolds number. At each shear displacement, several high-precision water flow tests were carried out with different hydraulic gradients then the critical Reynolds number was determined based on the developed criterion. The results show that (i) the Forchheimer's law was fitted very well to experimental results of nonlinear fluid flow through rough-walled fractures, (ii) the coefficients of viscous and inertial pressure drops experience 4 and 7 orders of magnitude reduction during shear displacement, respectively, and (iii) the critical Reynolds number varies from 0.001 to 25 and experiences 4 orders of magnitude enlargement by increasing shear displacement from 0 to 20 mm. These findings may prove useful in proper understanding of fluid flow through rock fractures, or inclusions in computational studies of large-scale nonlinear flow in fractured rocks.

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