Applications of Uncertainty Theory to Rock Mechanics and Geotechnical Mine Design

Author: 
Date created: 
2015-01-07
Identifier: 
etd8829
Keywords: 
Uncertainty analysis
Stochastic modelling
Reliability based design
Numerical modelling
Discrete fracture networks
Brittle fracture
Abstract: 

Uncertainty analysis remains at the forefront of geotechnical design, due to the predictive nature of the applied discipline. Designs must be analysed within a reliability-based framework, such that inherent risks are demonstrated to decision makers. This research explores this paradigm in three important areas of geotechnical design; namely, continuum, Discrete Fracture Network (DFN) and discontinuum modelling. Continuum modelling examined the negative effects of ignoring spatial heterogeneity on model prediction. This was conducted through the stochastic modelling of spatial heterogeneities found within a large open pit mine slope. DFN analysis introduced a novel approach to fracture generation to solve issues associated with the incorporation of traditional DFNs into geomechanical simulation models. Finally, discontinuum modelling explored the inherent mesh dependencies that exist in UDEC grain boundary models (UDEC-GBM). Conclusions suggest that a transition is required from deterministic to uncertainty based design practices within the geotechnical discipline.

Document type: 
Thesis
Rights: 
Copyright remains with the author. The author granted permission for the file to be printed and for the text to be copied and pasted.
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Senior supervisor: 
Doug Stead
Department: 
Science:
Thesis type: 
(Thesis) M.Sc.
Statistics: