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Semi-analytical procedure for considering roughness effect on hydraulic properties of standard JRC profiles

conference contribution
posted on 2013-01-01, 00:00 authored by M Zoorabadi, S Saydam, Wendy TimmsWendy Timms, B Hebblewhite
In most practical applications, water flow within the rock joints (rough surfaces) is simulated as laminar flow through two smooth parallel plates and cubic law is used for estimating flow rate. In this simulation, a constant opening is assumed between upper and lower parallel surfaces (hydraulic aperture) that will allow passing of the same volume of water flow through real joints. Roughness on rock joints produces variable aperture across the joints and increases the flow path length. These facts affect water flow within rock joints. Therefore, the validity of cubic law is in dispute and depends on accuracy of the hydraulic aperture estimation. In this study, the concept of local true aperture and tortuosity is applied to assumed joints where surfaces are matched to each other and correspond with standard Joint Roughness Coefficient (JRC) profiles. The local true aperture through the joint profile is computed for each JRC profile. A new equation is introduced between mechanical and hydraulic aperture for different JRC values.

History

Pagination

2848-2853

Location

San Francisco, Calif.

Start date

2013-06-23

End date

2013-06-26

ISBN-13

9781629931180

Language

eng

Publication classification

E1.1 Full written paper - refereed

Copyright notice

2013, American Rock Mechanics Association

Editor/Contributor(s)

[Unknown]

Title of proceedings

Proceedings of the 47th U.S. Rock Mechanics/Geomechanics Symposium

Event

American Rock Mechanics Association. Symposium (47th : 2013 : San Francisco, Calif.)

Publisher

American Rock Mechanics Association

Place of publication

Alexandria, Va.

Series

American Rock Mechanics Association Symposium

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