... slope is investigated by means of the upper bound method of limit analysis. The rock mass is treated as a continuum following Hoek-Brown failure criteria. The stability factor corresponding to the non-linear Hoek-Brown failure criterion is obtained by revising the solution following Mohr-Coulomb failure...

... metals & mining structural geology 13th international congress Reservoir Characterization well logging Triaxial Testing log analysis strength failure criterion test result Montreal assessment rock type compressive strength reservoir geomechanics Upstream Oil & Gas...

... estimated rock mass strength ( cm) using Hoek and Marinos approach and the use of Hoek and Brown failure criterion (Hoek et al, 2002) for known Geological Strength Index (GSI), estimated material constant (mi) and disturbance factor D. The tunnels at the first two sections at Chainages 1+609m and 1+826m...

... stress on the failure plane, which has gained wide acceptance in the literature for its better fit to experimental data. However, by transforming Mogi's criterion with ß , we show that Mogi's fundamental assumption imposes symmetry of the failure criterion with respect to the stress state factor value...

... strength Upstream Oil & Gas analysis method criteria criterion douglas failure criterion shear strength average stability number stability number failure criterion jointed rock mass slope stability Douglas criterion gsi 10 hoek-brown failure criterion tangential method limit...

... of these simulations showed that ANN-based failure criteria can be successfully implemented in numerical analyses. machine learning neural network criterion Artificial Intelligence failure criteria Reservoir Characterization Upstream Oil & Gas failure criterion annbased failure criteria formulation...

... ABSTRACT The intact rock constant, m i , is one of the three basic input parameters required for the widely used Hoek-Brown failure criterion. In the absence of laboratory testing, guideline charts with m i values based on rock type have been provided by Hoek and Brown and others. Our...

...Harmonising Rock Engineering and the Environment Qian & Zhou (eds) © 2012 Taylor & Francis Group, London, ISBN 978-0-415-80444-8 Empirical failure criterion for biaxially loaded granite X. Yun Cameco Corporation, Saskatoon, Saskatchewan, Canada H.S. Mitri McGill University, Montreal, Quebec...

... failure criterion multi-scale analysis rock mass Wellbore Design multi-scale limit load analysis strength evaluation Strength Characteristic reservoir simulation microscopic problem σij 0 evaluation limit load analysis Microstructure macroscopic problem equation Harmonising Rock...

... rock mass constitutive model Engineering Chinese Journal shear failure rock sample Upstream Oil & Gas modeling failure criterion plastic strain structural geology strength Rock mechanics damage constitutive model University mechanics tension failure elastic-plastic-brittle...

... were investigated at confining pressures up to 1.0MPa at room temperature. Results showed that triaxial compressive strength of CO 2 -saturated coal is 20% less than that of water-saturated coal at confining stress of 1.0MPa. Hoek & Brown failure criterion was used to explain the behaviour of coal...

... of the rock mass is also investigated for different positions of water level. criterion displacement vector limit analysis distinct element method Reservoir Characterization mechanism prediction bearing capacity ultimate bearing capacity Upstream Oil & Gas failure criterion groundwater...

...Harmonising Rock Engineering and the Environment Qian & Zhou (eds) © 2012 Taylor & Francis Group, London, ISBN 978-0-415-80444-8 Rock slope risk analysis based on non-linear failure criterion A.J. Li School of Engineering, Deakin University, Geelong, VIC, Australia M.J. Cassidy ARC CoE...

... brown non-lineal strength criterion adimensional height dilatancy thrust failure criterion failure surface Coulomb friction angle Strength Criterion Hoek strength criteria hypothesis equation Harmonising Rock Engineering and the Environment Qian & Zhou (eds) © 2012 Taylor & Francis...

... of isotropic stress (K0 =1). The tunnel has a circular section. The support pressure is constant over time. Plane strain analysis was carried out with stress and strain axial symmetry. The material involved has a constant failure criterion not dependent on the time-related evolution of strains...

... results of a particular case of parabolic type failure criterion are also incorporated. 1 INTRODUCTION This paper should be titled "Foundations in a rock mass as a continuous medium", since one of the first and foremost assumptions behind it is that rock behaves as a whole entity, being in most cases...

... of discontinuities. These equations can be incorporated in other constitutive models for effective simulation of jointed rock masses. e.g. Hoek and Brown (1980), Ramamurthy (1994). Most of these models are developed based on laboratory triaxial testing of small jointed rock samples. Hoek and Brown failure criterion...

... that the intermediate stress has a "strengthening effect", in the sense that, for a given value of σ 3, the value of σ 1 required to cause failure will be higher if σ 2 >σ 3 than it would be if σ 2 = σ 3. Mogi proposed that the failure criterion should be of the form τ oct = f ( σ m ,2), where τ oct...

... criterion triaxial test failure criterion test result failure strength principal stress ABSTRACT In this paper an extension of the known Hoek-Brown failure criterion to three dimensions is presented. First of all, a recompilation of compression, extension and true triaxial tests made with rocks...

... between Germany and Italy through Switzerland. reservoir geomechanics damage limit calculation Upstream Oil & Gas criterion Lötschberg Base Tunnel brittle failure Reservoir Characterization hoek-brown parameter semiempirical failure criterion Steg lateral adit excavation Wellbore...