... recognition scarp Upstream Oil & Gas slope stability analysis bedrock layer drilling fluids and materials bednarczyk procedia engineering 191 stability drilling fluid chemistry drilling fluid property calculation strength parameter landslide slip surface slope inclination external dump...

... Ratio Matrix/Fragments Point Load and Unconfined compression test results of rocks with varying cementation and ratio matrix/fragments shall contribute to understand the system behavior of soft rocks when they are disturbed during the excavation. 3.1.2 Strength parameters for the analysis Mostly...

... on the western side of one of the intra-mountain basins related to the recent extension tectonics of the Northern Apennines (Martini & Sagri 1993, 1994); the development of this basin is dated back to Early Pliocene. structural geology stability analysis Upstream Oil & Gas strength parameter...

... laboratory tests. laboratory test oedometer test investigation loading constitutive model Reservoir Characterization Upstream Oil & Gas input parameter normal stress strength parameter specimen annular gap direct shear test Pea Gravel determination lining segment numerical...

... prudencio slope failure mechanism Coalescence dip angle weak rock rock mass reservoir geomechanics rock bridge planar failure mechanism rock material type potential failure surface particle model procedure strength parameter rock material propagation failure mechanism Rock Mechanics...

... cliff faces were 3D modelled by GNSS supported terrestrial laser scanner and UAV. The onsite engineering geological analyses included the identification of major lithotypes, joint- and fault systems. For the slope stability analyses field documentation of strength parameters (Schmidt hammer rebound...

... discontinuities were carried out. Field geophysical investigations and rock quality estimates through the survey of exposed rock faces are also reported and discussed. Significance of shear strength parameters at different scales has also been evaluated by comparing shear strength results from small scale...

... and 1.0 MPa. From the interpretation of these tests, the Mohr-Coulomb strength parameters were obtained (Table 1). Plate load tests were also performed to deter- mine the deformability modulus of the conglomerate. These tests were carried out in accordance with the method suggested by the ISRM (1979...

... Abstract Probabilistic wedge stability analyses of a cavern are carried out considering two sets of joints J1 and J2 as random parameters with uncertain dip direction and strength parameters. Probabilistic numerical models are constructed employing Monte Carlo and four different point estimate...

... interesting was that the strength parameters obtained in the laboratory, were much lower than what was expected after preliminary visual inspections. The two most popular models in soil and rock mechanics, the Mohr-Coulomb and Hoek-Brown failure criteria, were used to estimate the strength parameters and both...

.... The solution proposed in original design comprised of vertical sprayed concrete wall and soil nailing. Nevertheless, an alternative solution, i.e. an open excavation has been executed. Thus, back analysis in this case is not only identification of actual strength parameters of subgrade but also the assessment...

... situation weathered gneiss dam design gneiss conservative value Alejano cohesion stability geotechnical characterization metals & mining horizontal acceleration strength parameter Ecuador means safety Rocscience inigemm circular failure Rock Engineering and Rock Mechanics: Structures...

...). Relations between the abovementioned strength parameters have been widely recognized and it is common practice to estimate uniaxial compressive strength, σ f , and tensile strength, σ t , from I S,50 (Broch & Franklin 1972, Bieniawski 1975,Wijk 1980, Cargill & Shakoor 1990). Since failure...

... & Gas direct shear test reddish non geotechnical characterization classification strength parameter MPa rock group Arteara rock avalanche reservoir geomechanics rock avalanche Ignimbrite absorption lithotype Rock Engineering and Rock Mechanics: Structures in and on Rock Masses Alejano...

... the lab tests indicated the dependence of the strength parameters on the confining stress. Peak shear strength values indicated, mainly, two different strength envelopes according to the depth of samples, with a higher cohesion for the samples deeper than 250 m (Fig. 1). 112 Figure 1. Lab strength...

... of the plastic models available in FLAC and FLAC 3D codes. The model referred as "Ubiquitous Joints" is one of the few most popular models of micro layered rock. Reservoir Characterization failure criterion bearing capacity constituent foundation jaeger criterion calculation strength parameter...

... Abstract Due to the complex nature of rock masses, geomechanical classifications are often used to estimate indirectly strength parameters, such as the Geological Strength Index(GSI), developed by Hoek. This work intends to compare the rock mass strength parameters assessed by the GSI index...

... presented in the conclusions. Upstream Oil & Gas metals & mining Thickness data mining marl excavator outflow calculation strength parameter rock mass mining operation Reservoir Characterization inspection slope stability analysis cross-section slope stability uniaxial...

... Rock joint shear tests. Methods, results and relevance for design J. Muralha National Laboratory for Civil Engineering, Portugal Abstract: Recent regulations introduced a limit state approach to geotechnical design by using representative values of the actions and of the strength parameters...

...Eurock 2012 Page 1 Stochastic estimation of the Hoek-Brown strength parameters using spreadsheet models M. Sari Department of Mining Engineering, Aksaray University, 68100 Aksaray, Turkey Abstract: Empirical models are being frequently used to estimate rock mass mechanical properties. It is well...