Modelling rock joint behavior from in situ block tests: implications for nuclear waste repository design
Technical Report
·
OSTI ID:6700759
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.
- Research Organization:
- Terra Tek, Inc., Salt Lake City, UT (USA)
- DOE Contract Number:
- AC06-76RL01830
- OSTI ID:
- 6700759
- Report Number(s):
- ONWI-308; ON: DE83000733
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
052002 -- Nuclear Fuels-- Waste Disposal & Storage
12 MANAGEMENT OF RADIOACTIVE AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES
58 GEOSCIENCES
580300* -- Mineralogy
Petrology
& Rock Mechanics-- (-1989)
DATA
EXPANSION
EXPERIMENTAL DATA
FLUID FLOW
FLUID MECHANICS
FRICTION
GEOLOGIC FISSURES
GEOLOGIC STRUCTURES
GROUND WATER
HYDRAULICS
HYDROGEN COMPOUNDS
INFORMATION
MANAGEMENT
MATERIALS TESTING
MATHEMATICAL MODELS
MECHANICAL PROPERTIES
MECHANICAL TESTS
MECHANICS
NUMERICAL DATA
OXYGEN COMPOUNDS
PERMEABILITY
RADIOACTIVE WASTE STORAGE
ROCKS
ROUGHNESS
SHEAR PROPERTIES
SITE SURVEYS
STORAGE
SURFACE PROPERTIES
TEMPERATURE EFFECTS
TESTING
WASTE MANAGEMENT
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12 MANAGEMENT OF RADIOACTIVE AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES
58 GEOSCIENCES
580300* -- Mineralogy
Petrology
& Rock Mechanics-- (-1989)
DATA
EXPANSION
EXPERIMENTAL DATA
FLUID FLOW
FLUID MECHANICS
FRICTION
GEOLOGIC FISSURES
GEOLOGIC STRUCTURES
GROUND WATER
HYDRAULICS
HYDROGEN COMPOUNDS
INFORMATION
MANAGEMENT
MATERIALS TESTING
MATHEMATICAL MODELS
MECHANICAL PROPERTIES
MECHANICAL TESTS
MECHANICS
NUMERICAL DATA
OXYGEN COMPOUNDS
PERMEABILITY
RADIOACTIVE WASTE STORAGE
ROCKS
ROUGHNESS
SHEAR PROPERTIES
SITE SURVEYS
STORAGE
SURFACE PROPERTIES
TEMPERATURE EFFECTS
TESTING
WASTE MANAGEMENT
WASTE STORAGE
WATER