... strength parameter geotechnical center cohesion ARMA 23 806 Quantifying the variability in interpretation of shear testing of a natural fracture. Franco, M.A., Potter, J., Ross, B.J. Geotechnical Center of Excellence, The University of Arizona, Tucson, Arizona, USA Copyright 2023 ARMA, American Rock...

... Characterization Engineering strength parameter stability Upstream Oil & Gas failure mode hydropower station Artificial Intelligence interlayer rock slope weathered depth structural geology cohesion sandstone argillaceous siltstone slope stability Excavation Slope rock mass sensitivity...

... ABSTRACT: Selection of appropriate shear strength parameters for mine spoil slope stability analysis and design is difficult because it requires prohibitively large laboratory equipment to test characteristic spoil samples under meaningful stresses. A convenient alternative to estimate mine...

... and compared with literature values. Guidelines for estimating the strength parameters mobilization can be concluded, including comparisons to usual intact rock parameters such as mi or UCS. Based on the implications of this study further development of strength mobilization models in hard rock masses...

... a relatively low differential pressure. Recommendations to the design of a CO2 reservoir are discussed. Reservoir Characterization structural geology co 2 mechanical property subsurface storage Brine sandstone US government Sequestration strength parameter stress-strain behavior peak stress...

... on extension tests leading to a simpler constitutive model. pore pressure strength parameter effective confinement stress reservoir geomechanics Upstream Oil & Gas strain behavior reverse triaxial compression test MPa triaxial compression test Reservoir Characterization Rock mechanics...

... and has some applicability. wellbore integrity hard rock pressure sensitivity Reservoir Characterization Upstream Oil & Gas residual strength reservoir geomechanics strength failure criterion strength parameter peak strength Wellbore Design criterion marble generalized cohesion...

... evolution for stress characterization are significant and add up to other important uncertainties in such analyses like the estimation of strength parameters. reservoir geomechanics borehole imaging Reservoir Characterization Reservoir Surveillance production monitoring wellbore seismic...

..., an understanding of the mechanism(s) and associated material strength parameters, was required. A back-analysis and calibration of the strength parameters for the salient rock mass and structural features was undertaken. The back-analysis consisted of understanding the conditions and trigger for the slope movement...

... ABSTRACT: Pit slope design relies on appropriate selection of design strength parameters. This selection is not trivial given the inherent heterogeneity of rock masses. In strong rocks, step-path failures may develop through combination of planar shear along joints and failure through intact...

... correlation sandstone toughness structural geology tensile strength Simpson fracture toughness strength parameter fracture toughness data Brazilian tensile strength Manco Shale ARMA 17-724 Laboratory Measurements of Strength Parameters for Fracturing Walle, L. E. and Stroisz, A. M. SINTEF...

... ABSTRACT: This paper investigates the effect that small sample sizes have on uncertainties associated with intact rock strength parameter estimations, using various combinations of strength data (namely, uniaxial and triaxial compressive, uniaxial compressive and indirect tensile...

..., necessitating scalped specimens, will generate conservative shear strength parameters. displacement shear box failure envelope shear stress direct shear box normal stress strength parameter scalped specimen shear strength friction angle strength direct shear test specimen kPa secant...

... strength parameters representative of all potential sliding failure planes. Because of improvements in laboratory testing equipment and changes in analysis methodology over the past approximately thirty years, older data from direct shear testing of intact rock specimens used for analysis with the shear...

... data. Seeking to minimize this testing-inherent error, previous research at Montana Tech has demonstrated the alternate method of limited displacement multi-stage direct shear (LDMDS) testing to yield more accurate strength parameters when shearing a single unique specimen under multiple normal...

... in the residual part indicates the residual strength. The negative slope part should describe the strength evolution from peak strength to residual strength. Mohr-Coulomb (M-C) criterion is employed and the inter-relations between post-peak behavior of the complete stress-strain curve and strength parameter...

... with mercury injection testing. Strength testing, which was on blocks from outcrop exposures or shallow (<60 m) depth cores, included unconfined and triaxial compression at effective confining pressures up to 20 MPa that gave Mohr Coulomb strength parameters of cohesion (c') between 1.5 and 2.5 MPa...

... acceptable level of uncertainty in the estimations. Also, a comparison of the results from our analysis with actual rock strength data shows that the probability of obtaining reliable strength parameter estimations using small samples may be very low. We further discuss the impact of this on on-going...

... are not available, preliminary parameters of coal-mass are calculated for a specimen size of 1.5 m. Young’s modulus and Poisson’s ratio are 3.0 GPa and 0.25, respectively. The Hoek-Brown peak strength parameters "m", "s," and "a" of the coal-mass are 1.659, 0.015, and 0.5, respectively. The unconfined peak...

... condition strength parameter numerical model rock mass behaviour metals & mining ARMA 15-552 Calibration of inelastic constitutive behaviour at a late stage mine and the challenges associated with data limited calibration Crockford, A.M, Kalenchuk, K.S. and Bawden W.F. Mine Design Engineering...