... and minimum horizontal stress are known. Previous investigations have mostly been based on bi-dimensional analysis, using 2D failure criteria. Theoretically, such 2D criteria are only valid for loading conditions corresponding to the test results used to determine material parameters, which is seldom the case...

... number of slaking cycles. Upstream Oil & Gas Korea rock slope granitic gneiss durability index criteria sandstone instability weathered rock slope stability Indicator Reservoir Characterization durability slake durability index stability sample jg-2 gneissosity slope...

...) at the rock-foundation interface. Upstream Oil & Gas outer ring wall Reservoir Characterization Parliament cbus excavation excavation-induced vibration Library foundation wall telecommunications criteria cbus footprint vibration level frequency ring wall bedrock excavation...

... as the controlled flow rate. A series of tests in unjacketed specimens yielded apparent breakdown pressures that increased linearly with the pore (=confining) pressure, and were well approximated by the two classical criteria. Tests in jacketed specimens, in which the far-field stresses were kept constant, revealed...

... criteria reservoir geomechanics strength criterion MPa principal stress shale reduction failure criterion plane strain condition Reservoir Characterization Upstream Oil & Gas pore pressure failure initiation hollow cylinder deformation Pacific Rocks 2000, Girard, Liebman, Breeds & Doe...

... to the implicit assumption made by Mohr-type failure criteria. Test results were used to define a new generalized strength criterion for each rock in terms of stress-tensor invariants. Upstream Oil & Gas criteria strength criteria reservoir geomechanics amphibolite specimen strength intermediate...

... rock is ideal. The tests are interpreted to propose an empirical failure criterion and in this way twelve empirical, mathematical and physical criteria, expressed in the convention of principal stresses, were considered. 1 INTRODUCTION for design of slopes and foundations on rock masses it is well...

... ABSTRACT : A great number of failure criteria have been proposed over the last 30 years or so to characterize the ultimate strength of intact rock specimens submitted to laboratory tests. After reviewing some features of rock failure for tensile and compressive stress states, the authors...

... project information. Artificial Intelligence machine learning criteria classification information construction method Upstream Oil & Gas Simulation database penetration rate utilization subsystem random number System Configuration equation excavation system performance simulation...

... rock slope design statistical analysis failure probability slope stability benefit cost ratio metals & mining means criteria slope failure Uncertainty Evaluation probability rock mass slope angle 'Aq~~yqxquasaxdax @ues pnp put? pqqw a3uaxa;tuy uasop aqq 'azys a~dlma xadoxduy p...