... 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...

... of HackÕs (1998) SSPC system which places less influence on rock quality designation and unconfined compressive strength than previous rock mass rating systems. The Hack weathering susceptibility rating has been modified by using chemical index of alteration values from XRF major element analysis. Another...

... Reservoir Characterization pyroclastic deposit cohesion stability probability netherlands antilles bunker hill SABA shear box test geomechanical analysis reservoir geomechanics Thickness Island rock mass lava Upstream Oil & Gas calculation slope debris landslide...

.... Needs for research on visualisation, rock mass strength assessment, and paths to failure are identified. INTRODUCTION Open pit mining of black coal from the Bowen and Sydney-Gunnedah Basin regions is a major contributor to the Australian economy. Over the past 15 years there have been rapid developments...

... INTRODUCTION: Two unusually large landslides in Hong Kong in August 1995, both of which caused loss of life and substantial damage to property, were influenced by localised concentrations of low strength, kaolin-rich zones within the weathered rock mass (Kirk et aI., 1997). Plate 1 shows one...

... Upstream Oil & Gas back analysis natural gas storage cavern Sakurai application Artificial Intelligence displacement reduction factor rock mass non-elastic strain Reservoir Characterization inhomogeneous zone cavern excavation strain distribution excavation iterative...

... ABSTRACT: We developed a new method the air tracer test to investigate the persistence of open cracks and loosening of rock mass slope. In this method, we use smoke, hot air, and/or specific gas as tracers injecting them into open cracks directly or using a specific double packer settled...

... ABSTRACT: For preliminary assessment of sites in jointed rock masses the expensive and time consuming field investigations are neither desirable nor feasible for all the sites. The rock mass classifications can help reduce burden of these investigations by indicating the range of strength...

... Artificial Intelligence displacement Excavation Procedure evaluation machine learning function parameter correlation excavation method rock mass ground transportation information excavation Case History procedure rail transportation accuracy prediction application sequential...

... defined from aerial photographs because they show some indistinct geomorphologic features. So as to show that the rock mass of the slope is estimated to be stable during operation, some detailed geological investigations were carried out in this area. The geographically recognized landslides...

... high stress condition steel rib in-situ stress condition Upstream Oil & Gas tunnel rattanpur upstream shotcrete rock mass Reservoir Characterization orientation Manglad drillability headrace tunnel foliation nathpa-jhakri hydroelectric project deformation reservoir...

... ABSTRACT: In jointed rock masses deformability is associated with the mechanical properties of the intact rock and the rock joints. It is also known that the deformation modulus of jointed rock masses is anisotropic because of the presence of rock joints. This paper presents an analytical...

... suggests that they remain the major unresolved ground control problem in underground mining". BACKGROUND Distinction between seismic events and rockbursts A seismic event is a transient vibration or stress wave caused by an inelastic deformation in a rock mass. The deformation may be in the form...

... and the development of a variety of methods to determine in situ stress in rock mass, rock stress has not been fully understood. A wide scatter of stress orientations and magnitudes is a proof of this fact and indicates that stress is influenced by several factors. The presence of geological fracture is one...

... Reservoir Characterization dolomite Raibl formation Drilling Faulenbach valley rock mass limestone fuessen tunnel dolina margin chainage 480 wetterstein limestone inflow Hauptdolomit Upstream Oil & Gas investigation excavation work tunnel dolina collapse breccia water...

... ABSTRACT: This paper discusses the application of the Convergence-Confinement method of tunnel design to rock masses that are assumed to obey the Hoek-Brown failure criterion. The basis of the Convergence-Confinement method and the interpretation of the three basic components of the method...

... ABSTRACT: Engineers generally employ empirical methods to estimate the properties of rock mass for the stability assessment of structures and feasibility studies since in-situ tests are usually expensive to perform. For such purposes, rock mass classification systems such as RMR and Q system...

... ABSTRACT: The influence of swelling rock desaturation on its behavior in tunneling is described. The swelling potential of the desaturated rock will be more pronounced, when compared to similar rock in saturated state. A new characteristic curve for the swelling rock mass was defined based...

... ABSTRACT: Tunnelling through the fragile, weak and jointed rock masses of Himalaya is a challenging task. Almost in all the tunnelling projects of Himalaya some or the other type of tunnelling problems have been encountered and are still being faced; be it a face collapse, chimney formation...

... ABSTRACT: Deformation and failure mechanism of rock masses are governed by the characteristics of geometrical distribution of discontinuities and the mechanical behavior in a single discontinuity. It is thought that stability of rock structures extremely depend on not only the existing...