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Title: Modelling rock joint behavior from in situ block tests: implications for nuclear waste repository design

Abstract

Simple, inexpensive index tests suitable for application to jointed core or jointed blocks of rock are described. These provide quantitative data on joint roughness, joint wall strength and residual friction angle, suitable for waste repository characterization. These three parameters form the basis of a new constitutive law of rock joint behavior which will enable numerical modellers to simulate the complete shear strength-displacement, dilation and closure of joints, including shear reversal and unloading cycles. Size effects are reviewed in detail and methods are developed for correcting the results of small scale tests to allow for limited sample size. The effects of shear displacement and dilation, normal closure and joint opening on permeability are modelled, so that fully coupled hydromechanical modelling can be achieved. The effects of extremely slow stress perturbations, periods of stick, and thermal loading on joint properties are also evaluated. The numerical modelling techniques are illustrated with numerous examples, and are validated against a large body of experimental data.

Authors:
Publication Date:
Research Org.:
Terra Tek, Inc., Salt Lake City, UT (USA)
OSTI Identifier:
6700759
Alternate Identifier(s):
OSTI ID: 6700759; Legacy ID: DE83000733
Report Number(s):
ONWI-308
ON: DE83000733; TRN: 82-025082
DOE Contract Number:  
AC06-76RL01830
Resource Type:
Technical Report
Resource Relation:
Other Information: Portions of document are illegible
Country of Publication:
United States
Language:
English
Subject:
58 GEOSCIENCES; 12 MANAGEMENT OF RADIOACTIVE AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES; RADIOACTIVE WASTE STORAGE; SITE SURVEYS; ROCKS; MECHANICAL PROPERTIES; TESTING; EXPANSION; EXPERIMENTAL DATA; FLUID FLOW; FRICTION; GEOLOGIC FISSURES; GROUND WATER; HYDRAULICS; MATHEMATICAL MODELS; MECHANICAL TESTS; PERMEABILITY; ROUGHNESS; SHEAR PROPERTIES; TEMPERATURE EFFECTS; DATA; FLUID MECHANICS; GEOLOGIC STRUCTURES; HYDROGEN COMPOUNDS; INFORMATION; MANAGEMENT; MATERIALS TESTING; MECHANICS; NUMERICAL DATA; OXYGEN COMPOUNDS; STORAGE; SURFACE PROPERTIES; WASTE MANAGEMENT; WASTE STORAGE; WATER 580300* -- Mineralogy, Petrology, & Rock Mechanics-- (-1989); 052002 -- Nuclear Fuels-- Waste Disposal & Storage

Citation Formats

Barton, N. Modelling rock joint behavior from in situ block tests: implications for nuclear waste repository design. United States: N. p., 1982. Web.
Barton, N. Modelling rock joint behavior from in situ block tests: implications for nuclear waste repository design. United States.
Barton, N. Wed . "Modelling rock joint behavior from in situ block tests: implications for nuclear waste repository design". United States.
@article{osti_6700759,
title = {Modelling rock joint behavior from in situ block tests: implications for nuclear waste repository design},
author = {Barton, N.},
abstractNote = {Simple, inexpensive index tests suitable for application to jointed core or jointed blocks of rock are described. These provide quantitative data on joint roughness, joint wall strength and residual friction angle, suitable for waste repository characterization. These three parameters form the basis of a new constitutive law of rock joint behavior which will enable numerical modellers to simulate the complete shear strength-displacement, dilation and closure of joints, including shear reversal and unloading cycles. Size effects are reviewed in detail and methods are developed for correcting the results of small scale tests to allow for limited sample size. The effects of shear displacement and dilation, normal closure and joint opening on permeability are modelled, so that fully coupled hydromechanical modelling can be achieved. The effects of extremely slow stress perturbations, periods of stick, and thermal loading on joint properties are also evaluated. The numerical modelling techniques are illustrated with numerous examples, and are validated against a large body of experimental data.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1982},
month = {9}
}

Technical Report:
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