Three-dimensional constitutive modeling of a granular mine tailings material
A three-dimensional soil testing system was developed to provide a convenient and accurate testing environment and to provide the capability of exploring the stress-strain-strength behavior of a fine-grained coal mine tailings material (or other types of soil) along general three-dimensional stress paths. This testing system was used to generate stress-strain-strength information for the fine coal refuse along several stress paths, i.e., Conventional Triaxial Compression (CTC), Reduced Triaxial Extension (RTE), Hydrostatic Compression (HC), and Constant Pressure (CP) stress paths. In all, 24 cubical tests were performed. In order to compare the results obtained from this cubical device to those obtained from conventional devices, 9 CTC tests were performed with conventional devices. The differences between the cubical system and conventional devices were evaluated. It was found that the sample size and the condition of end lubrication may be the two most important factors that need to be considered while comparing the cubical results to their conventional counterparts. A constitutive model was derived within the general framework of the Bounding Surface Plasticity theories. This model was found to be capable of predicting the stress-strain-strength behavior of the fine coal refuse along the CTC, RTE, and HC stress paths.
- Research Organization:
- West Virginia Univ., Morgantown, WV (USA)
- OSTI ID:
- 6029759
- Resource Relation:
- Other Information: Thesis (Ph.D)
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
54 ENVIRONMENTAL SCIENCES
SOIL MECHANICS
MATHEMATICAL MODELS
TAILINGS
MECHANICAL PROPERTIES
COAL MINES
LAND RECLAMATION
MATERIALS TESTING
MEASURING METHODS
MINERAL WASTES
PARTICLE SIZE
STRAINS
STRESS ANALYSIS
STRESSES
MECHANICS
MINES
SIZE
SOLID WASTES
TESTING
UNDERGROUND FACILITIES
WASTES
010900* - Coal
Lignite
& Peat- Environmental Aspects
510500 - Environment
Terrestrial- Site Resource & Use Studies- (-1989)