Risk Assessments for the Design of Subsurface Openingsby Dae S. Young, Michigan Technological Univ, Houghton, United States,
Abstract: A probabilistic approach was introduced to assess the risk of structural instability due to rock joint systems in rock mass, where subsurface openings are excavated, such openings as shafts, tunnels or drifts, and waste emplacement rooms. Specifically the probabilistic key block analysis was developed and applied on the local stochastic joint systems model, so the uncertainty in the design and the performance predictions due to variations and errors in measurements, and spatial variations in geotechnical parameters are well incorporated in the design criteria. Also, the sensitivity tests for design criteria can be made and so the structural design can be optimized at the early stages of site exploration and engineering study.
Subject Headings: Structural design | Joints | Rock masses | Risk management | Stochastic processes | Parameters (statistics)
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