Rock joint description and modelling for prediction of near-field repository performance
The shear behavior and normal closure behavior of rock joints have a major influence on the changes in joint conductivity to be expected during the life of a repository. Methods are described for obtaining the joint parameters required to model these conductivity perturbations. They include the joint roughness and the wall strength, which can both be obtained from simple tests on jointed drill core. Examples are shown that illustrate the shear stress-displacement, dilation and conductivity coupling that occurs when a joint of given size is subjected to shear under various levels of effective normal stress. Major increases in conductivity may occur. Examples are also shown that illustrate the stress-closure-conductivity coupling. This comprehensive joint behavior model indicates that important size-effects exist in shear behavior which are related to the joint spacing or effective in situ block size. The discrete modelling of near-field joint and fracture performance is essential for predicting the long-term integrity of a nuclear waste repository. 12 references, 7 figures.
- Research Organization:
- Terra Tek, Inc., Salt Lake City, UT
- OSTI ID:
- 6073479
- Report Number(s):
- CONF-831174-; TRN: 85-006164
- Journal Information:
- Mater. Res. Soc. Symp. Proc.; (United States), Vol. 26; Conference: Materials Research Society annual meeting, Boston, MA, USA, 14 Nov 1983
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
58 GEOSCIENCES
DRILL CORES
JOINTS
TESTING
CLOSURES
EXPERIMENTAL DATA
MATHEMATICAL MODELS
RADIOACTIVE WASTE DISPOSAL
RADIOACTIVE WASTE FACILITIES
RADIONUCLIDE MIGRATION
ROCKS
SHEAR PROPERTIES
STRESSES
DATA
ENVIRONMENTAL TRANSPORT
INFORMATION
MANAGEMENT
MASS TRANSFER
MECHANICAL PROPERTIES
NUCLEAR FACILITIES
NUMERICAL DATA
WASTE DISPOSAL
WASTE MANAGEMENT
052002* - Nuclear Fuels- Waste Disposal & Storage
580300 - Mineralogy
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& Rock Mechanics- (-1989)