... investigated between both the ubiquitous joint model and Cosserat model [4]. This paper adopts the continuum-based approach to implicitly model an isotropic rock mass (i.e.: smeared joints). reservoir geomechanics stiffness anisotropy orientation analytical solution elastic stiffness matrix...

... 191 anisotropic rock mass RVE matrix nesrine gabssi effective thermal conductivity tensor homogenization bulk modulus Procedia Engineering 191 ( 2017 ) 369 377 Available online at www.sciencedirect.com 1877-7058 © 2017 The Authors. Published by Elsevier Ltd. This is an open access article...

... as they contribute to a greater extent in deteriorating the intact rock properties. To incorporate the jointed 936 Figure 3. Joint sets and its parameters. rock mass in numerical model, anisotropic constitu- tive matrix is evaluated considering, elastic modulus of rock matrix as 7 GPa and Poisson s ratio of 0.17...

... influenced by single extremely persistent discontinuities can be quoted (e.g. Duffaut 2013). Moreover there are cases where rock mass structure is formed by hard rock blocks interspersed in a cataclastic matrix (e.g. Scott Dam, Goodman & Ahlgren 2000), the so-called ‘bimrocks’ (block-in-matrix rocks...

... al. 2009). These rocks, in essence, are a mixture of good-quality blocks, embedded in a less compe- tent matrix, whose shear strength and deformability are mainly ruled by the volumetric block proportion (VBP) (Lindquist 1994). This paper presents some of the in situ investiga- tions carried out...

... Oil & Gas drillstring design drill pipe selection dynamic behavior bit selection Drilling Equipment modeling centrifugal force excitation rotation lateral vibration borewell calculation Simulation axial-torsional vibration rock-bit interaction consideration matrix bit-rock...

... stress variability we propose use of a tensor variate normal distribution that treats stress tensor as a single entity. Here, we give the probability density function and estimation techniques for the mean and covariance matrix. Finally, using example two-dimensional stress data we show how the proposed...

...Rock Mechanics and Rock Engineering: From the Past to the Future Ulusay et al. (Eds) © 2016 Taylor & Francis Group, London, ISBN 978-1-138-03265-1 Effects of matrix permeability and fracture density on flow pattern in dual porous rock masses S. Namdari, A. Baghbanan & M.J. Habibi Department...

..., the REV represents distributed fractures idealized as penny shaped inclusions in a porous matrix. The effective properties computed by this model are anisotropic and depend on the intrinsic properties of the porous matrix and the topology and density of the fractures. We propose a novel Cascade Continuum...

... reservoir geomechanics Riemannian approach distance measure geometry Upstream Oil & Gas calculation Riemannian mean Reservoir Characterization riemannian geometry Rock mechanics stress tensor Health & Medicine interpolation tensor mean function matrix mean stress tensor...

... application large-scale underground excavation nonlocal mohr-coulomb model matrix multilaminate model constitutive law Abstract The present paper provides an example of using two advanced failure criteria, namely "nonlocal Mohr Coulomb with softening" and "multilaminate", for modelling...

... formation Ande excavation construction volcanic formation matrix tunnel drilling fluid property Upstream Oil & Gas reinforcement lining rock mass degradation abanico formation Rock Engineering and Rock Mechanics: Structures in and on Rock Masses Alejano, Perucho, Olalla & Jiménez (Eds...

..., and show the main orientations of the particles in the core samples after plastic deformation. The results of the laboratory compression tests show a correlation between the shape and orientation of the deformation ellipse and the particle/matrix ratio and the applied pressures. On the basis...

...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 Prediction of rock strength with matrix acidizing stimulation and induced wormhole by computational simulation methods. N. Jahani...

... phenomena are implied in this process: fluid diffusion in the fracture and in the matrix, fracture-matrix mass exchanges, plasticity and damage in the fracture tip because of high stress concentrations in this zone and finally the fracture propagation itself. This latter phenomenon changes the continuous...

... have been originally described by Cavers (1981) with reference of buckling strata. Also, when the rock matrix is weak, such failure is accompanied by the formation of "kink-bands" and therefore it has been recognized that discontinuities have only a partial role in the instability, the shear failure...

... is generally difficult for some types of rock such as laminated and/or fragmented rock material.To overcome this difficulty empirical prediction models were developed by considering some input parameters. Geological mixtures composed of rock blocks surrounded by weak matrix material are known as Block...

... by a clayey matrix including calcareous rock blocks which size can range from coarse sand to boulders and huge fragments of a formation. In this paper its geomechanical characterization has been faced with these criteria: Classical geotechnical approach; GSI approach; Bimrock approach. In general...

... 8348 pore space equation matrix deformation effective stress law Rock Mechanics for Resources, Energy and Environment Kwas´niewski & ydz ba (eds) © 2013 Taylor & Francis Group, London, ISBN 978-1-138-00080-3 Some remarks on the experimental determination of the Biot coefficients...

... of a clayey matrix with quartz and carbonates inclusions. The present study was devoted to the development of an experimental device of nanoindentation under variable hygrometry. An experimental methodology for nanoindentation, allowing the determination of micromechanical properties of the different phases...