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Keywords: dilatancy
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Proceedings Papers

Paper presented at the ISRM Regional Symposium - EUROCK 2014, May 27–29, 2014
Paper Number: ISRM-EUROCK-2014-030
... on a constant Poisson's ratio predicting the greatest volumetric strains and the most conservative (largest) dilation angle values. The corrected cycle data appears to agree very closely with the curve calculated based on a variable Poisson's ratio, and roughly fits a previously proposed dilatancy model. Since...
Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 2013, October 23–26, 2013
Paper Number: ISRM-EUROCK-2013-058
... triaxial test servo-controlled strength test test result granite dilatancy R k Mechanics for Resources, Energy and Environment Kwas´niewski & ydz ba (eds) © 2013 Taylor & Francis Group, London, ISBN 978-1-138-00080-3 Strain-softening characterization of granitic rocks and numerical simulation...
Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 2012, May 28–30, 2012
Paper Number: ISRM-EUROCK-2012-001
... Reservoir Characterization displacement rock joint suction control Upstream Oil & Gas normal stress roughness angle reservoir geomechanics roughness strength parameter shear displacement suction shear strength shear stress degradation dilatancy strength cohesion eurock 2012...
Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 2010, June 15–18, 2010
Paper Number: ISRM-EUROCK-2010-189
...) 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...
Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 2010, June 15–18, 2010
Paper Number: ISRM-EUROCK-2010-078
... is required (Vlachoupoulos & Diederichs, 2009; V&D, in what follows). The corresponding graph is shown in Figure 1. Engineering plastic radius MPa rock engineering LDP displacement Alejano radial displacement rock mass strain-softening rock mass dilatancy Reservoir Characterization...
Proceedings Papers

Paper presented at the ISRM Regional Symposium - EUROCK 2009, October 29–31, 2009
Paper Number: ISRM-EUROCK-2009-027
... guideline Hoek confinement stress tunnel rock mass quality Rocscience equation dilatancy 187 Rock Engineering in Difficult Ground Conditions Soft Rocks and Karst Vrkljan (ed) © 2010 Taylor & Francis Group, London, ISBN 978-0-415-80481-3 An approach for characterizing strain-softening Hoek...
Proceedings Papers

Paper presented at the ISRM Regional Symposium - EUROCK 2009, October 29–31, 2009
Paper Number: ISRM-EUROCK-2009-041
... 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...
Proceedings Papers

Paper presented at the ISRM Regional Symposium - EUROCK 2009, October 29–31, 2009
Paper Number: ISRM-EUROCK-2009-026
... 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...
Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 2005, May 18–20, 2005
Paper Number: ISRM-EUROCK-2005-003
...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...
Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 2002, November 25–27, 2002
Paper Number: ISRM-EUROCK-2002-017
...PLANAR FAILURE SURFACES ON ROCK ASSUMING A NON LINEAR STRENGTH LAW AND CONSTANT DILATANCY SERRANO, ALCIBIADES E. rs.J.c.c.r, Universidad Politecnica de Madrid, ESPANA OLALLA, CLAUDIO Laboratorio de Geotecnia, Cedex, Madrid, ESPANA PERUCHO, AUREA Laboratorio de Geotecnia, Cedex, Madrid, ESPANA...
Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 2002, November 25–27, 2002
Paper Number: ISRM-EUROCK-2002-096
..., 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...
Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 93, June 21–24, 1993
Paper Number: ISRM-EUROCK-1993-026
... 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...

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