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Please use this identifier to cite or link to this item: http://repository.iitr.ac.in/handle/123456789/15505
Title: 3D Analysis of coupled stress-flow in jointed rock masses using finite element method
Authors: Al-Obaydi M.A.
Samadhiya, Narendra Kumar
Viladkar M.N.
Published in: Proceedings of 42nd U.S. Rock Mechanics - 2nd U.S.-Canada Rock Mechanics Symposium
Abstract: Redistribution of stresses in jointed rock mass occurs as a result of underground excavation or any other activity that changes the stresses in the region. The alteration in stress pattern leads to changes in porosity or void ratio of rock material as well in the aperture, i.e. closure or opening of the rock joints. The present study proposes a 3-D coupled stress-flow analysis relating the stress and flow by indirect method. Opening or closure of joints due to normal and shear stresses has been considered with due attention to the dilatant nature of rough discontinuities. As a result, the aperture of joint changes and, in turn, the permeability has too. Joint properties including the attitude of joint, stiffness, aperture, spacing and roughness have been taken into account in the derivation of the constitutive laws and the behavior of a tunnel excavated in jointed rock mass has been examined. More disturbances in the contours of hydraulic head and pore water pressure have been observed near the tunnel periphery. The change in permeability upon redistribution of stresses is a function of the opening/closure of the joints. It has also been shown that the orientation and aperture of the joints have a pronounced effect on the fluctuation of the phreatic surface. ¬©2008, ARMA, American Rock Mechanics Association.
Citation: Proceedings of 42nd U.S. Rock Mechanics - 2nd U.S.-Canada Rock Mechanics Symposium, (2008). San Francisco, CA
URI: http://repository.iitr.ac.in/handle/123456789/15505
Issue Date: 2008
Keywords: 3D analysis
Constitutive law
Coupled stress
Hydraulic heads
Indirect methods
Joint property
Jointed rock mass
Phreatic surface
Pore-water pressures
Rock joint
Rock materials
Stress patterns
Underground excavation
Void ratios
Capillarity
Excavation
Rock mechanics
Three dimensional
Tunnels
Water
Wind tunnels
Rocks
Author Scopus IDs: 23982032400
6506534111
6701684084
Author Affiliations: Al-Obaydi, M.A., Dept. of Civil Engineering, College of Engineering, University of Mosul, Mosul, Iraq
Samadhiya, N.K., Dept. of Civil Engineering, Indian Institute of Technology, Roorkee, India
Viladkar, M.N., Dept. of Civil Engineering, Indian Institute of Technology, Roorkee, India
Corresponding Author: Al-Obaydi, M. A.; Dept. of Civil Engineering, College of Engineering, University of Mosul, Mosul, Iraq
Appears in Collections:Conference Publications [CE]

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