... (the more difficult to reproduce the overall observations). The computed convergences (and their ratio) and plastic zone extensions are consistent with the in-situ observations. GENERAL LAYOUT Within the perspective of deep geological radioactive waste disposal, the French National Radioactive Waste...

... compress 0 instability criterion journal figure 1 variability overbreak rock mechanic extension destress 0 15th ISRM Congress 2023 & 72nd Geomechanics Colloquium. Schubert & Kluckner (eds.) © ÖGG Reliability of Predicting damage in hard rock mass around deep tunnels in terms of its convergence...

... requires automation through parametric design. This paper presents an evaluation of currently used software solutions for TIM, which are able to implement parametric modelling via extensions or scripting. The comparison includes aspects of geometrical modelling, integration of alphanumerical information...

... characterization sedimentary rock solid waste management structural geology europe government excavation configuration underground laboratory callovo-oxfordian claystone orientation extension deep tunnel excavated mhm underground laboratory geological subdiscipline strength variation strength...

.... The effect of temperature on drilling fluid loss law as well as the influence of temperature difference on fracture initiation, fracture geometry, and fracture extension rate is investigated using a fully coupled Thermal-Hydrological-Mechanical (THM) model built using the finite element method...

... numerical solver. united states government reservoir characterization resonant frequency method geology reservoir geomechanics budapest geologist hungary government geological subdiscipline doi extension laboratory cyclic loading experiment economics upstream oil & gas europe...

... et al. 2007). Continuous monitoring of the excavated zone around the drifts revealed the development of a fractured zone (extensional and shear fractures) induced by the excavation. The extension of this zone depends on the drift orientation and the in situ stress field (Armand et al. 2014...

... and applicability, it suffers from neglecting the influence of the intermediate principal stress. It is now generally recognized that while stress state at a point changes from triaxial compression (σ 1 > σ 2 = σ 3 ) to triaxial extension (σ 1 = σ 2 > σ 3 ), the peak strength of material increases...

... diameters in compression and extension are similar. Lastly, Figure 7c shows another two triaxial extension tests at angle = 60o, compared to triaxial compression strengths at the same angle. The extensional strength at the lower stress level shows the same 13th International Congress of Rock Mechanics...

... , rock strength is higher in triaxial extension ( .s 2 = .s 1 ) than in triaxial compression ( .s 2 = .s 3 ). reservoir geomechanics Rudnicki failure criterion assumption Mogi strength criteria rock strength extension Reservoir Characterization failure criteria Rock mechanics...

... Upstream Oil & Gas criterion sandstone extension Mogi laboratory test dimension true triaxial test extension triaxial test compression reservoir geomechanics strength shirihama sandstone Takahashi intermediate principal stress Reservoir Characterization hoek-brown failure...

... associated with damage development, or the anisotropy of damage observed during laboratory tests. Pellet orthoradial stress time dependent behavior reservoir geomechanics Upstream Oil & Gas gallery extension Reservoir Characterization numerical simulation damage process excavation...

... extension does not exceed 0.5 time the radius of the shaft. It does not seem to depend on blasting patterns. ZUSAMMENFASSUNG Ein Forschungs- und Versuchsprogramm wurde aufgestellt, um die beschadigte Zone im Bereich der Kimmeridgemergel zwischen 80 und 100 Meter Tiefe beim Zugangsschacht des im Bau...

... to recommend extra support measures. These data are also used to design the support of the powerhouse during its extension phase. In diesen bericht wird die bohrmcthode von kraftwerk ecavation in stupenweise dargestelt, und in die richtung d.sicherung, Mit hilfe von monitoring systeme. Die monitoring...

... displacement, at the fracture centre, amounts to 0.2–13.8 cm depending on fracture parameters. The fracture extension, friction angle and shear stiffness are found to be the most important. Le but de cette etude est de determiner le deplacement maximal en cisaillement qui puisse se developper le long d'une...

... changes the hydraulic as well as the seismic properties. Therefore the extension of the zone of increased permeability should also be detectable by seismic measurements. The hydraulic properties were investigated using double or multi packer systems specially developed for hydraulic tests within the EDZ...

... countermeasure extension failure prevention additional vertical frictional stress shaft wall metals & mining surface subsidence aquifer compression mining area strata unconsolidated layer Reservoir Characterization Thickness unconsolidated strata deformation behavior sandy...

... in conditions of loading as close as possible from the actual one which prevails around the tunnel since the beginning of its construction, Specific tests based on radial extension, and radial compression of thick hollow cylinders are presented with the purpose to characterise middle term and long term...

... by existing tools. structural geology sur homogeneisation hydromechanical behaviour flow in porous media Fluid Dynamics deviatorique fracture characterization methode perméabilité extension Reservoir Characterization Upstream Oil & Gas matrice rocheuse coefficient MPa evolution...

... case studies. Hilbert et al. (1998) also present a 3D model although with different applications. They have good correlation between measured and computed subsidence , I, A logical development of the mixed numerical model, pre- sented in more detail above, is its extension to three-dimensional problems...