Modelling rock joint behavior from in situ block tests: implications for nuclear waste repository design
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; TRN: 82-025082
- Resource Relation:
- Other Information: Portions of document are illegible
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
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