.... reservoir geomechanics manifestation experiment examination explosion underground nuclear explosion characteristic granite fissure Upstream Oil & Gas Thickness mechanical effect spivak Reservoir Characterization destruction deformation strength rock massif underground explosion cavity...

... propose afin de creer localement des plans d'accumulation d'energie favorisant la generation de fissures de grande extension. Pour pouvoir conclure sur l'efficite du procede de stimulation à l'explosif, une experimentation en grandeur reelle a ete realisee sur un site offrant les mêmes caracteristiques...

... attributed to propagation of fissures and flaws present in the rocks. Slaking intensity increases with the amount of fissures and time of prior drying. The slaking also leads to the observed swelling strain in 1-D swelling tests and invert heave 'in a tunnel. RESUME: Le comportement de l'etanchement et du...

... discontinuities was analyzed using the 3DEC (3-dimensional Distinct Element Code). Initially, the modelling results were used to explain the development of fissures (cracks) observed in the upstream wall as benching progressed downward The fissures were shown to result from a wedge formed by three shear zones...

.... behavior characteristic discontinuous rock mass urayama dam excavation process rock mass Reservoir Characterization horizontal displacement characteristic excavation elevation reservoir geomechanics inver wire extensometer coefficient elastic behavior fissure displacement analysis result...

... of various liquids in a horizontal joint. 2. DEVELOPMENT OF THEORETICAL MODELS 2.1 Fissure Percolation On the basis of the fundamental realization that normally only the fissures are available to conduct water, researchers began working intensively, around the mid-1960s, to develop models describing...

...), mais avec un coefficient de rugosite egal it JRCn 3.1 Etude de Ia d~ronnabilit~ La deforrnation totale d'une roche fissuree comprenant n familles de fissures regulieres et continues est la somme de la defonnation de la roche intaete et de la defonnation qui se manifeste au niveau des discontinuites de...

.... If water is available it ~ change into gypsum. The undisturbed anhydrite-claystone rock is commonly dense, dry, and unfissured. "Fissures" are completely filled with fibrous gypsum. The reason for the existence of the anhydrite- gypsum rock near the surface is that the alteration anhydrite-gypsum causes...

... fissure downstream face stability calculation strength three-dimensional condition rock foundation calculation bearing capacity stability nonlinear calculation local strength regulation dimensional computational study foundation operation concrete dam stress-strain state Three...

... rocks often have fine joints or fissures which are not groutable by cement. Therefore, it is very difficult to reduce the permeability in weak rock foundations, particularly in shallow areas, by cement grouting. On the other hand, since weak rock foundations show large deformability, these foundations...

... by simulations of the spatial distribution of joints. The roof bolting is calculated according to the assumption of the hanging support. RESUME: On propose une methode pour calculer le soutènement dans les terrains affectes par une fissuration naturelle. A partir du releve de fissures dans une galerie...

... drilling operation information discontinuity penetration rate drill string borehole 3 laboratory torque fissure Upstream Oil & Gas borehole tsoutrelis packer Directional Drilling strength site investigation diamond drilling drilling variable thrust investigation Drilling...

... and carbonate cemented arkose, with the majority being the former. The sandstone is compact, well cemented and greyish-white in colour. The clay in clay cemented arkose amounts to 13–19 %, being mainly Kaolinite (Fig. 1). With some pyrite, well developed joints and micro-fissures perpendicular to these joints...

... of fissures, and state of fissures. classification and test data is carried out Each element has three levels: A, B, and C for before and after the in situ tests. hardness; I, II, and III for spacing of fis- Accordingly, the correlation bdreen the bedrock sures; and a,b, and c for the state of fissures...

... Corrosion Inhibition oilfield chemistry well integrity cement steel tube grout strand experimental study shear stress scale test fissuration Upstream Oil & Gas bearing behaviour tendon rock mass jirovec Mortar bond length Anchor rock anchor corrosion protection fissure transmission...

... in their surroundings, which in turn will lead to fissures (voids) formation. So the physico-chemical swelling and the kernels will be accompanied by a mechanical swelling and deteriozation of the structure. Temperature Changes Freezing; dilatation due to water-ice transformation, which as a result...

...SOME ASPECTS OF THE STUDY CONCERNING THE DISTRIBUTION OF JOINTS AND FISSURES IN MASSIVE LIMESTONE ROCK MASSES Quelques aspects de la recherche de la distribution des fissures dans les masses rocheuses de calcaire Etliche Aspekte der Analyse Ober die ZerklOftung massiger Kalksteine der...

.... The arch dam foundation is composed of limestone and dolomite dipping steeply (under the angle of 50 to 70°) towards the downstream pool. The rock foundation is disturbed by a tectonic fault traversing the ringhbank abutment of the dam, by a number large fissures and by six sets of joints. The jointing...

...-ting states. Due to this, applied mechanics, beingbased on fundamental ideas of mechanics ot continuous deformable media, inCludes at pre- sent: mechanics of mass-crystalline solid and fissured rock and semirock masses; mecha-nics of one-phase, two-phase and multiphasesoils; mechanics of organomineral...

... complicating the model, and the development of a sufficiently simple model that enables known experimental and calculation methods to be employed for its quantitative analysis. The paper deals with the basic types of geomechanical models in use to day: continuous, block and fissured-block type...