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Constraining numerical models with geomechanical data and microseismic fault-plane solutions

1993; Elsevier BV; Volume: 30; Issue: 7 Linguagem: Inglês

10.1016/0148-9062(93)90124-v

1879-2073

C.F. Connors, T. Urbancic, W.F. Bawden, R. P. Young,

earthquake and tectonic studies

Geomechanical and seismic analyses are used to constrain interpretations based on a 3-D boundary element model (BEM) for different stages of an excavation at depth. Mapping results indicate four dominant joint sets throughout the rock mass. Fault-plane solutions defined two potential failure planes, one of which closely fits, in both strike and dip, the mapped Stratigraphic Bedding set. BEM calculated principal stress orientations compared well to the pressure, tension, and intermediate axes obtained from the fault-plane solutions. Ubiquitous joint analyses, with BEM derived shear/normal stresses for each joint set at the event locations, indicate that only the Stratigraphic Bedding met the derived Barton-Bandis failure criteria. Based on these correlations, it is suggested that an integrated approach with seismic and geomechanical data can be used to constrain numerical stress analyses interpretations.