... mechanics discontinuity Reservoir Characterization complex reservoir orientation geometry compression fracture coalescence fracture Coalescence fracture propagation intensity mechanism Dershowitz fracture system propagation FRACTURE SYSTEMS, FRACTURE PROPAGATION AND COALESCENCE Herbert H...

... reinforcement geosynthetic sheet geosynthetic reinforcement sinkhole embankment diameter assumption geometry straight cylinder design method stiffness expansion EXPERIMENT AND DESIGN OF GEOSYNTHETIC REINFORCEMENT TO PREVENT LOCALISED SINKHOLES Blivet J.C.1, Khay M.1, Villard P.2 and Gourc J.P.2...

... permeameters developed to date utilize an injection zone or test area of a geometry similar to that shown in Figure 1 of the PERMAC device, which was developed at Laval University in Canada (Tavenas et al., 1990). Instruments with this geometry are referred to as the Mark I method in this paper. It is observed...

... geomechanics rock element exploitation void transducer quarry geometry evolution design method DESIGN METHODS AND MONITORING IN ORNAMENTAL STONE UNDERGROUND QUARRYING C. Oggeri1 ABSTRACT Ornamental stones are quarried both by means of open pit exploitations and by underground openings. This second...

... the presence of tension cracks and discontinuities hidden in the rock mass; different hydraulic conditions are examined to account for cleft pressures. The quarry at Fioranello is used as an example. The analysis is carried out for a simplified geometry in which a single scarp with a height, H = 23 m...

... should be linked closely with standard rock mass assessment. Artificial Intelligence fuzzy logic expert system Reservoir Characterization orientation discontinuity geological approach information investigation interpretation tunnel prediction geometry fabric Winsor Upstream Oil...

..., leading to analytical solutions under simplified geometry, and has been applied to analyze the displacement behavior of a reinforced tunnel face under spherical symmetry (Wong et al., 2000). strength mechanism tunnel face macroscopic strength criterion homogeneous material criterion limit...

... geometries and geological features but also may be interested in displaying results of numerical simulations which may by themselves contain 3-D information (i.e. stress tensors, flow patterns etc.). Applications can be found in tunneling, mining and reservoir engineering. VIRTUAL REALITY AND DISPLAY...

... investment in tunnelling equipment, flexibility to employ complex excavation geometries, less overall support cost, adaptability in different ground conditions. The essential characteristics of this method are the utilisation of the ground around the tunnel as a support member, use of shotcrete...

... is ±50 mm. Scanned data are processed to create a digital image of aggregates to be employed in further analyses. Size, shape and volume analysis of particles has been conducted in two ways. A so-called geometrical analysis is based on simple applications of analytical geometry. Another method consists...

... treatment. The geometry of the pit is such that a two-dimenensional, plane strain analysis is considered adequate to meet these objectives. 2 ANALYSIS AND INPUT DATA 2.1 Analysis Method All analyses have been made using the two dimensional finite difference program FLAC [l] which can include in the model...

... stimulating coal bed formations and sandstone reservoirs lies again in the complexity of the hydraulically-induced hydraulic fracturing Upstream Oil & Gas Bennaceur Denver US government complex reservoir stimulation Eng coalbed methane concentration geometry determination hydraulic...

... be rectangular in outline) must be arranged in uniform columns parallel to any abutments or rib pillars, and must adhere to certain very generous limits on inter-pillar spacings (Appendix A). Pillar geometries can change over consecutive columns. (b) The geometry is quasi-2D, that is, mined areas in the "dip...

... ABSTRACT: The rock- and fracture mechanics aspects of the modelling of induced hydraulic fractures in porous rocks are discussed. A classification of the various models of fracture geometry is given, and the geotechnical mechanisms which potentially control the preferential fracture growth...

... geomechanics fracture height Newtonian fluid fracture propagation closed form geometry potential theory equation coefficient fracture surface stress contrast drilling fluid property Upstream Oil & Gas three-dimensional hydraulic fracture propagation Perkin fracture propagation filtration...

... for determining foundation strength using elasticity and Mohr-Coulomb failure criterion is described and the important effect of the horizontal field stress on foundation strength is discussed. The models used for experimental and numerical studies approximate the geometry of a 72 per cent extracted mine layout...

... (alignment of fluid inclusions). The principles of the method involve use of fluid inclusions not only as a tool for the establishment of the physicochemical conditions under which fluids were entrapped, but also as a microstructural marker of the geometry of the permeability. The study shows that through...

... interest of such an analysis, but emphasized the mathematical complexity of the theory (Maury, 1987). A specimen can be said to show signs of bifurcation when its field of displacement or geometry has shown sudden drastic changes such as the strain localisation and concentration in a narrow band observed...

... by Barkovskii & Isaev (1979), these criteria yield only a very approximate measure of the stress state, since for numerous variables, such as the exact geometry of the drill kerf, no account is taken. 2.0 DISC SHAPES Principal stress orientations, as well as stress magnitudes can be determined from...

... coordinate system generation system independent variable geometry control function coordinate line curvilinear coordinate system procedure generation equation equation grid generation means Cartesian coordinate Poisson boundary segment curvilinear coordinate Grid generation of dams Jose...