... distribution. The stress distribution is coupled with a transverse isotropy failure criterion in a mechanically consistent way to find the exact location of initial crack. It is shown that the location of the initial crack depends on the transverse isotropy orientation and load configuration. 1. Introduction...

... fictitious force and displacement discontinuity elements (Wiles 2005). metals & mining strength failure criterion geometry reservoir geomechanics criterion Upstream Oil & Gas criteria stress state georgieva Reservoir Characterization stope crown pillar rock mass behavior...

... ABSTRACT: In this paper a new solution for calculating the ground reaction curve at the tunnel crown around a circular tunnel, considering true triaxial stress state, is developed. The new solution is based on the unified strength failure criterion; thus it consists of a wide range...

... Abstract We investigate the problem of uplift failure of the rock mass above shallow, sealed, pressurized gas storage tunnels by means of the upper bound theorem of the limit analysis assuming a continuum rock mass model obeying the Mohr Coulomb failure criterion with tension cut off...

... Abstract Rock failure criteria were used to predict rock strength and to characterize deformation behavior of rock mass or intact rock under different loading conditions. Hoek and Brown failure criterion was considered as one of the most popular failure criteria, which is widely used in rock...

... Abstract A semi-analytical procedure is introduced to solve the stress and displacement distributions of strain-softening rock masses surrounding a circular opening on basis of Hoek-Brown failure criterion. The numerical solution and closed-form solution are obtained for plastic softening...

... et al. (2013) generalized such failure mechanism, in the framework of limit analysis, for tunnels excavated in ‘low quality’ rock masses that follow the non-linear Hoek–Brown failure criterion. But this previous work was focused on TBM excavated tunnels, characterized by a circular section bored...

... or the partial or complete filling with deposits of crystals or particles due to the circulation of fluids, in the macropores of altered materials. More specifically, the study performed was intended to obtain: A failure criterion of these materials, based on a few parameters. A geotechnical classification...

... hardening behavior for the short term instantaneous deformation.The non-linearity is related to the current confiding pressure and the hardening feature is based on Mohr-Coulomb failure criterion. For the delayed deformations, on the other hand, a viscoplastic hardening unit is used consisting...

... Abstract A complete application of the plasticity theory to the behavior of different types of foundations in rock media is presented. The modified Hoek & Brown failure criterion has been selected to reproduce the rock mass behavior. The ultimate loads of shallow and deep foundation...

... of the variations of the different parameters involved in the obtained safety factors, for the bearing capacity of the rock mass. The original Hoek & Brown (1980) failure criterion has been used together with the Serrano & Olalla (1994) methodology to calculate the ultimate bearing capacity. 1...

... Abstract Recently, the Hoek-Brown failure criterion is one of the mostly used failure criterion for rock mass. The constants of this failure criterion depend on, among the others, the Geological Strength Index ( GSI ) and the disturbance factor ( D ). The purpose of this paper is to analyze...

... Abstract The paper deals with formulation and numerical implementation of anisotropic strength condition for micro layered rock. Periodically layered two–constituent microstructure is considered. The failure criterion of the constituents is assumed to be governed by Drucker-Prager strength...

... sustainability stability analysis sustainable development Coal Measure rock Engineering MPa Siltstone strength tunnel main roadway rock mass failure criterion water pressure storage Rock Mechanics for Resources, Energy and Environment Kwas´niewski & ydz ba (eds) © 2013 Taylor & Francis Group...

... stresses. Comparison of the analytical results and the experimental data illustrates that the non-linear failure criterion estimates the plastic zone radius with a better accuracy. 1 INTRODUCTION Determination of the plastic zone radius is an important problem in geotechnical, petroleum and mining...

... of this study was to obtain a cost-benefit balanced design of the Koprubasi powerhouse cavern and support system, limiting the convergence displacements & the plastic zones around the cavern. Artificial Intelligence displacement failure criterion Upstream Oil & Gas criterion failure surface...

... conditions. In the present study, a thermo-mechanical modified Mohr-Coulomb failure criterion is proposed based on the extensive review and interpretation of mechanical properties of granites exposed to high temperatures. The deduced criterion takes into consideration the effects of thermal damage...

... will depend on the initial in situ stresses, the reservoir pore fluid pressure, and the pressure exerted on the borehole wall by the drilling mud. reservoir geomechanics Engineering failure criterion fracture network Reservoir Characterization Upstream Oil & Gas Rock mechanics international...

... ABSTRACT: The Mohr failure envelope for rock materials is a convex curve strongly dependent on the level of confinement and truncated at low normal stresses. The most commonly applied failure criterion – the Mohr-Coulomb criterion – matches the observed failure envelope poorly. Using...

... is suggested for this commonly employed failure criterion. 1 INTRODUCTION A great number of rock strength criteria have been proposed over the past three decades (Hoek & Brown, 1980; Yudhbir et al., 1983; Sheorey et al., 1989; Yoshida, 1990; Ramamurthy, 2001). Of these different strength criteria...