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Evolution of fracture normal stiffness due to pressure dissolution and precipitation
File(s)
Author(s)
Lang, PS
Paluszny, A
Zimmerman, RW
Type
Journal Article
Abstract
The normal stiffness of a fracture is a key parameter that controls, for example, rock mass deformability, the change in hydraulic transmissivity due to stress changes, and the speed and attenuation of seismic waves that travel across the fracture. Non-linearity of normal stiffness as a function of stress is often attributed to plastic yield at discrete contacts. Similar surface-altering mechanisms occur due to pressure solution and precipitation over larger timescales. These processes partition the fracture surfaces into a flattened contact region, and a rough free surface that bounds the void space. Under low loads, contact occurs exclusively over the flattened part, leading to rapid, exponential stiffening. At higher loads, contact occurs over the rough surface fraction, leading to the conventional linear increase of stiffness with stress. It follows that a relationship exists between the history of in situ temperature and stress state of a rock fracture, and its subsequent deformation behavior.
Date Issued
2016-07-21
Date Acceptance
2016-06-25
Citation
International Journal of Rock Mechanics and Mining Sciences, 2016, 88, pp.12-22
URI
DOI
ISSN
1873-4545
Publisher
Elsevier
Start Page
12
End Page
22
Journal / Book Title
International Journal of Rock Mechanics and Mining Sciences
Volume
88
Copyright Statement
© 2016 Elsevier. Licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/
Sponsor
Natural Environment Research Council (NERC)
Grant Number
NE/L000660/1
Subjects
Science & Technology
Technology
Physical Sciences
Engineering, Geological
Mining & Mineral Processing
Engineering
Rock fracture
Stiffness
Compliance
Diagenetic processes
Pressure solution
Precipitation
NOMINALLY FLAT SURFACES
ROUGH SURFACES
CONTACT MECHANICS
FLUID-FLOW
ROCK FRACTURES
HYDROTHERMAL CONDITIONS
PERMEABILITY REDUCTION
SINGLE FRACTURES
RUBBER-FRICTION
NORMAL STRESS
Mining & Metallurgy
0905 Civil Engineering
0914 Resources Engineering And Extractive Metallurgy
Publication Status
Published