.... reservoir geomechanics Rock mechanics extension compression Reservoir Characterization Triaxial Testing specimen intermediate principal stress ivan jane�ek procedia engineering 191 laboratory triaxial testing sandstone stress difference stress path Upstream Oil & Gas amban mishra...

.... waste management Upstream Oil & Gas reservoir geomechanics repository area Reservoir Characterization repository chamber stress Redistribution underground radwaste repository chamber investigation excavation acoustic emission extension repository Artificial Intelligence Engineering...

... widespread and expand further deep in the rock media, and extensional fractures are located near the wall with a more heterogeneous dip and strike. This description fits the geological survey of the pilot and the final drifts. Despite the few boreholes drilled, it seems that fracture extension of the pilot...

... failure criterion relation original criterion rock anisotropy criterion anisotropy Tsiambao extension Saroglou Bagheripour Hoek ABSTRACT: Rock failure criteria were used to predict rock strength and to characterize deformation behavior of rock mass or intact rock under different loading...

... such as plateau-type mine is also important. Upstream Oil & Gas displacement extension excavation slope angle reservoir geomechanics excavation model rock slope excavation step surface displacement partial excavation model deformation plateau part load effect horizontal displacement...

... which results in a significant increase of the effective permeability in this zone. reservoir geomechanics strength waste management Upstream Oil & Gas threshold ti radioactive waste repository Reservoir Characterization repository chamber dimension extension Diederich radioactive...

... for design and construction of underground excavations. So it is important to have a suitable criterion to predict the onset of this kind of damage. Due to the extensive studies on stability analysis in underground spaces, which are excavated in brittle rocks, the role of crack initiation threshold and crack...

... for the entire range of stress ratios (not shown in Figure 5). With increasing overburden and a stress ratio K0 = 0.75, extensional fracture zones appear left and right of the tunnel invert with minor extensions toward the tunnel centre (see Figure 5 for K0 = 1.5 and 100 m depth). 4.2 Results of Belchen Highway...

... of two measuring points of m and n are x(m) and x(n), respectively. Change in distance (extension) s(x(m), x(n)) between them is given by the following equation. where r(mn) is the unit vector of the line m-n and is represented as r(mn) = (x(m) x(nx(m) x(n By substituting Eq. (2) to Eq. (3), s(x(m...

... Artificial Intelligence displacement three-dimensional extension Upstream Oil & Gas rock joint rock joint constitutive model cyclic loading extension loading shear stress shear behaviour solid waste management loading path asperity Amadei constitutive model saeb Rock Mech...

... whether or not grouting leads to unwanted and dangerous fracture extensions in rock. The criteria which control the Pressure Sensitive Grouting (PSG) are the pressure drop, the residual pressure, the pressure - grouting volume ratio and the time dependent behaviour. This "design as you go" philosophy has...

... Reservoir Characterization Martin intersection cube thin section Upstream Oil & Gas microcrack Lac du Bonnet granite granite p-wave velocity orientation variation MPa grey granite s-wave velocity polarisation borehole extension tunnel face 2 Eurock '96, Barla (ed.) ©...

... ABSTRACT: Initiation of damage is defined as the onset of irreversible volumetric strains, and is determined by laboratory experiments. Axisymmetric triaxial tests following compression and extension stress paths have been performed, with an overall volumetric strain measurement...

... shown that at a 50 m distance from the mined-out area having an over 100 m extension across the strike, deformations approach 0.01 and more, causing fractures to be opened. Apparently, the zone of inelastic deformations (ZID) was formed near the mined-out area and, therefore, it was necessary...