... materials. Seal System salt concrete stability rock salt axial strain investigation waste management programme deformation behaviour MPa Upstream Oil & Gas dopa full-scale demonstration specimen Material Behaviour creep strain rate dilatancy deformation onset stress level...

... reservoir geomechanics pillar core strength model Upstream Oil & Gas confinement extensometer data evolution pillar metals & mining Sudbury dilation rock mass Reservoir Characterization stress path constitutive model dilatancy numerical model constitutive model choice...

...Rock Engineering and Rock Mechanics: Structures in and on Rock Masses Alejano, Perucho, Olalla & Jiménez (Eds) © 2014 Taylor & Francis Group, London, 978-1-138-00149-7 A detailed look at pre-peak dilatancy in a granite determining plastic strains from laboratory test data G. Walton & M.S...

..., which is able to reflect this relation and which also allows obtaining evolving strength criteria (cohesion and friction values). We have also accounted for the post-failure dilation behavior of these rocks, studied elsewhere. The derived model has been implemented in a numerical code, and some simple...

... roughness angle reservoir geomechanics roughness strength parameter shear displacement suction shear strength shear stress degradation dilatancy strength cohesion eurock 2012 tanφ normal displacement mechanical behaviour tangent Mechanical Behaviour of Rock Joints under Shear Loading...

...) for some basic assumptions that have now been extended. The method is valid for materials that may have either a linear or non-linear strength criterion (parabolic or Hoek-Brown), a non-horizontal surface and an earth-wall friction angle. The method considers the material dilatancy. Moreover, the failure...

.... (2010). The parame- ters needed to characterize such a rock mass include the peak and residual failure criteria, elastic parame- ters, and two post failure parameters selected among dilatancy, plastic parameter and drop modulus. Special attention has been given to analyze the role of dilatancy on LDPs...

... estimate stress-strain behavior. These parameters include the peak and residual strengths of the Hoek-Brown criterion, the elastic Young s modulus, the Poisson s ratio, the average dilatancy angle and the so-called drop modulus. The characterization process is based on drawing together recently published...

... and secant Poisson's ratios, the threshold of absolute dilatancy, the axial strain at failure and the dilatant volumetric strain at failure. anna mudstone dilatant volumetric strain characteristic ultimate strength Reservoir Characterization axial stress axial strain threshold moisture...

... and residual failure criteria c. Post-failure deformability parameters To characterize post-failure we need to know not only the evolving and residual failure criteria, but also two more values; for instance, dilatancy angle and drop modulus, or dilatancy and the val- ues of the plastic parameter the residual...

...Eurock 2005 -Impact of Human Activity on the Geological Environment - Konecny (ed) © 2005 Taylor & Francis Group, London, ISBN 04 1538 042 1 A model to estimate the dilatancy angle of rock masses L.R. Alejano & E. Alonso Department of Natural Resources & Environmental Engineering, University...

... Rock slope stability is analysed assuming toe planar failure surfaces. Dimensionless magnitudes and a non-linear Hoek and Brown strength law are used, and constant dilatancy depending on the degree of fracturing and weathering of the rock mass is assumed. The strength law, which is verified...

..., the frictional properties of the material are modified as a consequence of the changes in grain size distribution. One of the salient features of the proposed model is its capability of reproducing the stress dilatancy behaviour observed in Pozzolana Nera - a pyroclastic weak rock of the area of Rome (ltaly...

... dilatancy reservoir geomechanics wellbore stability analysis sandstone damage model damage degree triaxial test Eurock '93, Ribeiro e Sousa & Grossmann (eds) © 1993 Balkema, Rotterdam 90 54103396 Wellbore stability analysis using an incremental damage model Analyse de la stabilite d'un puits en...