... to effectively model shale mechanical properties after interaction with drilling fluid filtrate. In this study shale swelling stresses were integrated into the prominent Mohr-Coulomb failure criterion and therefore a new form of this criterion has been introduced which combined the natural mechanical properties...

..., as Mogi-Coulomb strength criterion can better describe the failure features of rocks under high geostress and rock micro-unit strength obeys the Weibull distribution, a new statistical damage constitutive model is established. Then, comparing the new model based on Mogi-Coulomb criterion with the Drucker...

... & Gas Simulation structural geology criterion rock crack propagation loading fracture reservoir geomechanics node continuous-discontinuous cellular automaton method iteration crack propagation automaton cellular automaton increment propagation freedom compression Rock...

... integrity at each location was evaluated considering two criteria. The first criterion is related to dilatancy of rock salt: the integrity is guaranteed if rock stresses do not exceed the dilatancy boundary. The second criterion is related to fluid pressure: the integrity is guaranteed if the hydrostatic...

...-Coulomb criterion is generally used for simulating the fault slip because of simplicity of the equation and limitations of commercial software used for the analysis. Rock joints and faults encountered in underground mines are basically undulating and curved (Wallace & Morris 1986), and behaviour...

... criterion, which neglects the role of σ 2 , predicting only the lower limit of rock strength for a given σ 3 . strength crystalline rock characteristic Upstream Oil & Gas variation specimen compressive strength Coconino sandstone principal stress Reservoir Characterization Triaxial...

..., Li & Low 2010, among others, using elastic-perfectly-plastic model. This paper deals with more complex constitutive model, namely elastic-strain-softening model. Further investigations are conducted in the present study. Artificial Intelligence criterion coefficient Reservoir...

... the non-continuum mechanics method thinks the rock mass as a discrete medium and the effects of cracking can be considered alone. Thus, the non-continuum mechanics is more suitable for the simulation of cracking in surrounding rock of roadways. Upstream Oil & Gas criterion numerical analysis...

... (and, of course, excavation conditions) will also influence the design. Reservoir Characterization criterion Norwegian criterion lining requirement reservoir geomechanics Power House pressure tunnel investigation excavation design approach selection concrete lining leakage tunnel Upstream...

... are used to evaluate the integrity of the salt barrier. For this purpose, the dilatancy criterion and the hydraulic criterion are considered. Introduction Geoscientific surface exploration looking at the suitability of the Gorleben salt dome as a potential site for a geologic repository for high...

... is analyzed by strength reduction method. But inhomogeneity is the basic characteristics for geotechnical materials. Engineering slope stability analysis safety factor Strength Reduction Method criterion sort judgment inhomogeneous characteristic equation Upstream Oil & Gas material...

... storage displacement gas temperature hydraulic fracturing temperature distribution convection thermal expansion coefficient rapid depressurization cavern tensile closure spring meeting crotogino rock temperature Upstream Oil & Gas criterion thermal stress rock mass fracture onset...

... of two angles describing the orientation of the rock bedding. Bedding has an important effect on the behaviour of such type ofrockssinceitcontrolsbothitsmechanical behaviour (e.g.,highestcompressibilityindirection perpendicular to Upstream Oil & Gas criterion structural geology Reservoir...

... reservoir geomechanics criteria Chang brittle fracture Upstream Oil & Gas plane intermediate principal stress compression Reservoir Characterization criterion MPa Strength Criterion triaxial strength criterion true triaxial testing fracture strength specimen Mogi Haimson...

... Reservoir Characterization strength failure mode anisotropic strength property isotropic rock orientation residual strength reservoir geomechanics criterion loading orientation experimental study different loading orientation Upstream Oil & Gas brittle-ductile transition...

... element method. Different numerical results between the single-material and bi-materials specimens have also been made. According to the mixed mode fracture theory e.g. the  max criterion, the conditions which estimate when the mixed mode crack in the bi-materials specimens may propagate and whether...

... reservoir geomechanics intensity factor criterion crack surface friction hydraulic fracturing stress intensity factor failure criterion Wellbore Design confirmation specimen rock material Reservoir Characterization Upstream Oil & Gas friction coulomb-mohr criterion zhu...

... geologic modeling reservoir geomechanics criterion waste management Upstream Oil & Gas geomechanical safety analysis geological modeling overburden calculation Reservoir Characterization dilatancy boundary jife code three-dimensional structure dilatancy geomechanical model...

...ISRM-Sponsored International Symposium on Rock Mechanics: Rock Characterisation, Modelling and Engineering Design Methods 1 1 INTRODUCTION The non-linear Hoek-Brown (HB) strength criterion is widely employed in numerical analysis for tunnel design, as the failure criterion to simulate...

... ABSTRACT Empirical rock failure criteria generally relates lateral stresses to axial strengths by a particular equation in which uniaxial tensile and/or compressive strengths are to be estimated from the failure criterion by applying the obtained parameters from triaxial datasets...