... a quite similar strength behaviour, but very different deformabilities. The measures of dynamic and static deformabilities under loading prove the influence of the progressive closure of open cracks on the compliance tensors of both gneisses. The relationship between the elastic parameters...

... Abstract Interpretations of cavity expansion tests (pressuremeter, radial jack, etc.) are based (in most occasions) on the analysis of the deformability of a cylindrical cavity in a continuous, isotropic, and homogeneous medium. However, many rock masses show an anisotropic behaviour due...

... in anisotropy associated with an increase in confinement. The stress dependency of rock anisotropy implies that linear elasticity may be of limited value when describing the deformability of anisotropic rocks and that it should be replaced by non-linear elasticity or more complex constitutive behavior...

... Abstract The paper presents an analysis of laboratory and field investigations of the anisotropy of natural early Permian claystone deformation behaviour. Current analytical solutions for determining the stress-strain state of anisotropic soil bases are overly complex and designed for simple...

... Abstract One of the most challenging tasks in rock mechanics is the accurate evaluation of deformability and strength characteristics of jointed rock masses. Attempts to characterise large-scale rock mass properties in the laboratory are seldom undertaken due to the difficulty of obtaining...

... tests, allowing the identification of differences between the small- and large-scale tests and the determination of upscaling factors. A straightforward evaluation method is presented, highlighting the effect of block orientation and block proportion on the shear behavior, shear strength and deformation...

... taken as reference. Non-destructive tests (porosity and ultrasonic waves propagation) and destructive tests (uniaxial compressive strength and deformability) were performed over available samples. The results show that uniaxial compressive strength and elastic modulus decrease as the temperature...

... not be as representative as the obtained in the other two formations. structural geology strength strain gauge Upstream Oil & Gas natural water content laboratory relation water content mean value FMAM deformability specific weight strata Reservoir Characterization longitudinal anisotropic rock...

...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 Effects of loading conditions on strength and deformability of fractured rocks a numerical study M. Noorian Bidgoli & L. Jing...

... Abstract Air-dry and water-saturated samples of a sandstone and a mudstone from the Upper Silesian Coal Basin, Poland, were tested under uniaxial compression conditions with the aim of revealing the effect of moisture on the deformability of these sedimentary coal measure rocks. The volumetric...

... in the reinforcement system. Performed back stress-strain analysis also showed need for the additional correction in the correlations between deformation characteristics and rock mass classification. INTRODUCTION In the course of several past years in the area ofRijeka, Croatia, many buildings were constructed after...

... Reservoir Characterization reservoir geomechanics Barton modification Upstream Oil & Gas Pereira correlation strength formula Engineering Geology sandstone Bieniawski foundation deformation modulus determination Serafim deformability classification RMR GPa situ test rock...

...Eurock '96, Barfa (ed.) (c) 1996 Bafkema, Rotterdam. ISBN 90 5410 843 6 Analysis of different-scale deformation studies of rock masses L'analyse des recherches a l'echelle differente dont caracteristiques de deformation des massifs rocheux Analyse del' Deformationsforschungen von dem...

...Eurock '96, Barfa (ed 1996 Bafkema,Rotterdam.fSBN905410843 6 Opening deformability and lining design in deep tunneling: Predictions, remarks and design suggestions Deformabilite du fouille et projet du revetement pour galeries profondes: Predictions, reflections et indications Verformbarkeit der...

... displacement discontinuity geometry Itasca Consulting Group deformation Engineering Reservoir Characterization instability phenomenon rock discontinuity unbalanced force characterisation study rock mass Corvara cliff Barla deformability Discontinuity Network strength parameter...

... displacement discontinuity dam-foundation system deformability Reservoir Characterization abutment water pressure rock mass foundation crest finite element water level mesh representation jointed rock foundation Upstream Oil & Gas friction angle element model application...

... experienced when tunnelling in poor rock and fault zones are well known over the world. Low strength, high deformability and heterogeneity of the rock mass lead to difficulties in prediction of the tunnel performance: Although the general geological situation may be known from the investigation programme...

.... There are significant differences in deformability between the two banks. During the construction vertical displacements in the foundation were recorded. Based on this information, back-analysis techniques are used to determine the average deformability of each zone of the rock mass. A finite element model is used...

... ABSTRACT: Joints orientation and properties are between the major factors at the origin of the anisotropic behavior of rock masses. This paper stresses the role of joint orientation, with respect to the loading direction, in determining the deformational behaviour of a rock mass by means...

... borehole tensile stress rock mass compression deformability displacement test core determination axis tensile strength Upstream Oil & Gas variation assessment loading interpretation diameter initial stress flat jack diagram biaxial chamber means Eurock '93, Ribeiro e...