... decomposition for three main types of three-dimensionally stressed states has allowed the more clear understanding of physical foundations of the summarized compression. structural geology rock strength loading Reservoir Characterization Upstream Oil & Gas great depth hard rock deformation...

... sites accord well with the theoretically predicted ones. On the basis of this study, the permeability at great depth is considered. 1 INTRODUCTION In the recent topics of rock hydraulics, much attention is focused on ground water flow through various geological discontinuities to solve some problems...

... mecanisme Reservoir Characterization effet great depth rupture Revalor ce phenomene faille phenomene recouvrement couche coup exploitation discontinuous rock behavior veine que contrainte Rock at Great Depth, Maury & Fourmaintraux(eds), © 1990 Balkema, Rotterdam. ISBN 9061919754 Le...

... Introduction This Symposium General Report attempts to highlight important developments in Rock Mechanics for applications to engineering problems at great depth. Much of the report was presented orally in session # 9, but in an abbreviated form. The many excellent written and oral...

... typical in situ stresses at shallow depths. However, at great depths (say over 1–2 km) use of the proper stress-pressure relation is critical if a more realistic maximum horizontal stress magnitude is to be determined. 1 INTRODUCTION Wells deeper than ever before are being drilled for oil production...

... reservoir geomechanics microcrack pressure solution great depth crack propagation deformation Rod...

... in the fractured zone. Through the computer modelling, it is found that grouted rock bolt can retard the convergence of roadway, however, at great depth, the effect of rock bolt is not so remarkable as expected from experiences at present mine roadways. 1 INTRODUCTION Strata control is one of the most important...

... that such support will provide adequate support at great depth. 1 INTRODUCTION The depth of operation of gold mines in South Africa is continually increasing and, at present, the deepest mining production is taking place at some 3400m below surface. Mining at such depths is a very difficult operation...

... are given to evaluate the effects of the softening and dilation of the rock mass on the stability of underground tunnel. Some suggestions are also given to improve the support of underground tunnel at great depth. 1. INTRODUCTION The stability of tunnel depends more on the response of the rock mass...

..., with the increase of constructions of large underground structures, studies concerned with rock joint distribution, which will affect foundations at great depth, have been made actively, though, there are only few studies on development of modelling systems of jointed rock masses as a serial system to be integrated...

... because of the loss of cohesion. strength Earthquake crust mechanical behavior rhombic block viscocity great depth Tangshan Earthquake origin time ult pl ne Reservoir Characterization mechanism experiment MPa rthqu ke Upstream Oil & Gas mech nism Appl fracture sequence...

... importance if underground excavations are located at great depth or exposed to high confining stress fields for which the failure mechanisms are stress-induced. Except in a few instances, (Mogi, 1971, 1972; Amadei and Robison, 1986; Lu, 1988) the effects of general triaxial stress states on the in situ...

... ABSTRACT: At great depth stresses are approximately equal to the strength of rock. That is why failure develops near such underground excavations. But this failure may not be entire because its value depends not only from stresses but also depends from strains. On the basis of experiments...

... ABSTRACT: When constructing underground openings at great depths, particular problems resulting from the squeezing characteristics of rock masses are often encountered. Large plastic deformation is one of the most critical problems and it must be considered in design practices. In order...

... that an appreciation of the dominant deformation mechanisms acting at particular conditions will guide the form of macroscopic constitutive laws for non-saltrocks. INTRODUCTION: Understanding rock behavior at great depth and elevated temperature requires quantification of deformation processes which do not occur...

... ore zone stress ratio interpretation Reservoir Characterization herget great depth stress measurement modulus ratio stress tensor Orebody rhyolite situ stress field stress value vertical stress ratio perpendicular field stress Canadian Shield anisotropy Rock at Great Depth, Maury...

... comportement du massif rocheux. Upstream Oil & Gas methode profondeur massif rocheux comportement post rupture localisation application stability problem grande profondeur rnodelisation plasticite rupture tunnel fracture communication great depth general report par Rock at Great...

... system, but reflectors can be located with a precision better than 0.5 m. Reservoir Characterization information instrument investigation resolution borehole great depth radar Stockholm solid waste management Fracture Zone RAMAC system receiver antenna new technique directional...

... ABSTRACT: This General Report requested by the Organisers attempts to describe the state-of-the-art as perceived by the Reporter in the area of the determination of rock properties at great depth by physical methods. The paper focuses on laboratory studies of rocks under physical conditions...

... be deduced from geophysical surveys. INDUSTRIES INVOLVED IN RESEARCH ON ROCK DISCONTINUITIES Predicting the role played by rock discontinuities in fluid migration and stability of structures at great depth is an old challenge presented to scientists by many industrial organizations. These include firms...