... ABSTRACT: The tunnel across the Pyrenees, joining by a high speed train Barcelona (Spain) and Montpellier (France), will have a total length of 8200m. In order to characterise the rock mass, several site investigations, in situ and lab tests have been performed. Also, a full scale gallery has...

... ABSTRACT: The 570 m long Tarifa Experimental Gallery has allowed the investigation of three of the five flysch units involved in the future tunnel of Gibraltar. This Tunnel will have a length of 38 km approximately and will cross the Strait. For this reason, the results obtained from in situ...

...), and the excavation of a gallery 84 m long to connect the new shaft with the existing facility. The knowledge acquired since the beginning of the construction of the underground laboratory has led to the use of improved techniques, which have significantly reduced both the disturbance of the host rock and the cost...

... friction gallery adjacent rock seam thickness seam elastic wave thickness decrease rock burst deformation EFFECTS OF SEAM THICKNESS VARIATIONS ON THE RISK OF ROCK BURSTS Vladimír Petro 1 2 ABSTRACT In spite of considerable efforts of geomechanic surveillance in individual hard-coal mines...

... Reservoir Characterization Upstream Oil & Gas material property Wellbore Design criterion metals & mining displacement coal wellbore integrity strong convergence radial stress boundary Houillere convergence mathematical simulation tunnel gallery application underground...

... a heater borehole Bl. Possible macro- and microfracturing will be detected by means of so called acoustic cross-hole measurements. Fans of acoustic P-wave velocities are determined providing information about the structural changes of the rock salt in a pillar and in the wall of a gallery at the 800 m...

... ABSTRACT: An analysis is given of a case history of the deterioration of a gallery along a long wall coal panel during the extraction of the coal. Many observations have been carried out during the winning of the panel and additional information was gathered during the winning of a second coal...

...Rock at Great Depth, Maury & Fourmaintraux (eds), © 1989 Balkema, Rotterdam. ISBN 906191975 4 Basic research for the destressing of the rock ring surrounding a gallery under severe stress Recherche fondamentale sur la decompression de la roche autour d' une galerie soumise a de fortes contraintes...

... reservoir geomechanics surge shaft gallery shaft Upstream Oil & Gas surge shaft excavation stability excavation plant extension reinforcement rock wall aldeadavila hydro-power plant extension sluice gate chamber elevation excavation work Reservoir Characterization fissure...

... hydroelectric project axis Upstream Oil &amp; Gas shear discontinuity gallery shaft reservoir orientation criteria major principal stress excavation crane beam Thickness dominican republic discontinuity principal stress river Rod< Mechanics and Power Plants, Romans (ed) C 1988 Balkema...

..., tailrace tunnels, cable galleries and access tunnels are excavated. Therefore, the surrounding rock mass of these openings is likely unstable because it is repeatedly influenced by blasting and excavation. In order to ensure the stability of the surrounding rock, measures should be taken, either...

... from the different galleries that make up the underground complex; these made it Possible to know the elastic Characteristics of the area in which the cavern is situated. The cavern, aspects of which have been dealt with on other occasions (Navalón et alt., 1979, Navalón and Alcazar, 1987, Navalón...

... gallery flat jack Alto Lindoso SYNOPSIS: For a large underground power station located in Portugal, an extensive rock mechanics test program was performed. The aims of the in situ tests are ~he quantification of the state of stress using the stress tensor tube and the small flat jack methods...

... SUMMARY: Khao Laem Dam ia a 90 m high concrete faced compacted rock filled dam. The damsite is in an area of cavernous limestone and treatment to prevent water loss through the right abutment involves the driving of six grouting galleries as the access to fill the concrete into the cavities...

.... Exoscarn is formed within the marbles by contact metamorphism process. Wellbore Design cavern metals &amp; mining classification Reservoir Characterization Upstream Oil &amp; Gas marble sidewall rock bolt Rock mechanics Investigation gallery reservoir geomechanics ore storage chamber...

... curtain, keeping the reservoir level at about low water level of the reservoir, stepwise investigations were carried out with exploration holes from the grouting gallery and spillway tunnel. And finally the leakage path and the defective part in the grout curtain were found out. This paper presents...

... level based on the laboratory model test, in order to prevent the occurrence of hydraulic fracturing of core at the Contact zone by fault grouting from the gallery in the foundation rock. FEATURES OF THE FOUNDATION Geological features The geological features of the dam site are characterized...

.... balloon borehole leakage cesafill foundation elevation 380 negra kg cm2 Drilling cesabloc gallery grout curtain capa negra Upstream Oil &amp; Gas canelle dam foundation crevice karstic rock treatment marl layer KARSTIC ROCK TREATMENT OF THE CANELLES DAM FOUNDATIONS J. DIMAS, Min. Eng...

... gallery rock mass penetration foundation GENERAL REPORT FOUNDATIONS AND SLOPE TREATMENT PIERRE LONDE, Dr., Dir., Coyne et Bel/ier, Paris, France O. INTRODUCTION Whatever the type of dam built on a rock foundation the geo- technical properties of the rock mass have to be clearly reco- gnized...

... discontinuity Reservoir Characterization stability analysis gallery necessary friction angle concrete structure stress distribution foundation rock mass intake structure Upstream Oil &amp; Gas normal stress powerhouse excavation configuration foundation reservoir geomechanics calculation plane...