... strength gsi adjustment equation metals & mining defect bridge barton hbm strength directional hoek-brown strength knowledge management co-aligned defect shear strength ir bridge reservoir characterization directional strength stability adjustment baczynski spm strength...

... require good appreciation of geological structure and potential failure modes in rock slopes. If appreciation is poor, slope design is perhaps likewise poor. Stability analysis should be straightforward for slopes with known, through-going geological defects; but this task requires more thought if exact...

...Rock Mechanics for Natural Resources and Infrastructure Development Fontoura, Rocca & Pavón Mendoza (Eds) © 2020 ISRM, ISBN 978-0-367-42284-4 A molecular dynamics study on defect effect on the mechanical properties of kaolinite H. Yang, Z.F. Han & Manchao He State Key Laboratory for Geomechanics...

... Upstream Oil & Gas rock mass strength underground construction reservoir geomechanics 13th international congress assumption US government confinement ROCK mass CHARACTERIZATION brittle rock defect Reservoir Characterization Kaiser strength discontinuity rock mass rock...

... of very high intact strength and joints with low persistence. The effect of these properties on rock mass deformability and strength is illustrated by estimation of dam foundation deformability from tiltmeter measurements and assessment of critical foundation failure mechanisms from estimates of defect...

... ABSTRACT Although a seemingly simple problem, there is still a large degree of conjecture as to how to estimate the strength of a rock defect. At the laboratory scale (approximately 100 mm) there are numerous models available most notably the Barton criterion andwhat is generally defined...

... & Gas argilite convergence measurement excavation tunnel calculation defect Lemaitre orthotropic case convergence Tournemire site time-dependent behaviour deformation 955 Rejeb A., Time-dependent behaviour of Tournemire argillites (France). ISRM 2003 Technology roadmap for rock mechanics...

... to preexisting defects, using Theory of plasticity and Fracture mechanics is investigated. In the case of the triaxial state of stress failure in the geomaterials is in the form of shear band, while in the case of uniaxial state of the stress, the degradation of material is caused by the crack propagation...

... their properties with respect to their behaviour in cut slopes. Although these aims apply to the intact, unweathered, soft rock materials, and in particular aspects related to slope degradation, the influences of defects, weathering state and colluvium on cut slope performance are also important...

... Upstream Oil & Gas point defect creep test experimental result gabbro viscosity Nabarro poise defect secondary creep strain rate center-loaded beam experiment kumagai granite maxwell liquid unloaded beam crust creep grigg herring SYNOPSIS: Nabarro (1948) pointed...

... SUMMARY: A vibrational resonance technique nas been used to investigate the influence of defects on the dynamic behaviour of a rectangular mine opening. This paper describes the instrumentation used and the results obtained from laboratory experiments conducted on a series of idealized...