... 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 Upstream Oil & Gas criteria rock mass reservoir geomechanics criterion extraction open stope pillar Reservoir Characterization stope crown pillar rock mass...

... 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...

... 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...

... of Geotechnical and Underground Engineering, Huazhong University of Science and Technology, Wuhan, China 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...

... alteration of the particles or the par- tial or complete filling with deposits of crystals or particles due to the circulation of fluids, in the macro- pores of altered materials. More specifically, the study performed was intended to obtain: 1. A failure criterion of these materials, based on a few...

... 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 are obtained, respectively. The theoretical...

... 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...

... feature is based on Mohr-Coulomb failure criterion. For the delayed deformations, on the other hand, a viscoplastic hardening unit is used consisting of a frictional hardening Mohr-Coulomb slider and of a viscous dashpot element, connected in parallel. The viscoplastic hardening unit is connected...

... 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...

... social responsibility strength failure criterion shaft MPa water pressure sustainable development Engineering Siltstone main roadway tunnel phe plant storage rock mass Rock Mechanics for Resources, Energy and Environment Kwas´niewski & ydz ba (eds) © 2013 Taylor & Francis Group, London...

... and HB failure criterion. The use of different failure criteria (HB, MC) along with the effect of strain softening on the convergence displacements were investigated next. In the last section of the study, the design of the support system and the possible choices for the layout of the prestressing...

... 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...

... 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...

... 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, the Hoek...

... 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 hydraulic fracturing aperture mud density fracture network matrix block Reservoir...

... parameters for rock mass and the form of sliding surface are determined. The sliding surface for a rock slope is interpreted as a geometrical locus in which the combination of normal and shearing stresses satisfy the phenomenological failure criterion. 1 INTRODUCTION The field of slope stability encompasses...