Going Forward: What Can We Do? Limit Equilibrium Analysis of Slopes.

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Presentation transcript:

Going Forward: What Can We Do? Limit Equilibrium Analysis of Slopes

Can We Improve Characterization? Can we measure the inputs needed for numerical modelling? Better characterize fracture networks, joint stiffness and strength Can we keep better records? Organized, well-kept, electronic records/data

Can We Improve Brittle Rock Modelling? Common in many rock engineering situations

Can We Improve Brittle Rock Modelling? Can we better model range of brittle fracture behaviours? Brittle failure initiation Propagation of fractures after initiation Behaviour after failure – spalling, buckling, etc. Potential of application of discontinuous numerical methods Development of improved constitutive models

Can We Better Apply Numerical Tools? Can we progress towards quantitative predictions? Field measurements + back-analysis for in situ properties Can we determine how efficient our designs are? Field measurements and monitoring in order to assess by how much we over-design

Can We Better Capture Variability? Modelling of uncertainty and spatial variability? Application of Conventional statistical approaches Case I FS = 1.35, PF = 11.4% Case II FS = 1.12, PF = 0.71%

Can We Better Capture Variability? Application of Geostatistics/Random Field Theory – resolution of tension between using ‘averaged’ values and ‘discrete’ values at different locations Risk management techniques

Can We Better Capture Variability? Factors of safety – ranged from 0.95 to 2.1

Thoughts on Implications of DFNs Need for multiple realizations Appropriately scaled block properties

Thoughts? Ideas? Questions?