... a more realistic estimate of shear strength to be made at low values of normal stress, preventing potential over-design problems. Nevertheless, the HB model neglects the effect of the intermediate principal stress on material properties. Limited studies on the variation of apparent cohesion and friction...

... iop publishing iop conf determination geological subdiscipline engineering variation rock mech geologist limestone elasticity moduli rock engineering carbonate rock theory correlation europe government reservoir characterization environmental science 833 coefficient borriol cooling...

... Abstract This research evaluates the variation in the Drilling Rate Index (DRI) and its relationship with thermal damage on thermally treated rocks. Samples from ‘Prada’ limestone, a lower cretaceous formation in the southern Pyrenees (Lleida, Spain), were subjected to temperatures of 105, 300...

... size effect in terms of strength at low confinements. Indeed, the UCS increases as sample diameter increases up to around 50 mm, but decreases thereafter. However, results obtained put forward that this strength variation with scale tends to be mitigated for higher confinements where the scale effect...

... Abstract In this research, the variation of thermal conductivity with temperature of a limestone and its relationship with porosity is studied. Samples from Prada formation, a lower Cretaceous limestone from the Catalan Pyrenees (Spain), obtained from the Tres Ponts road tunnel were subjected...

... example environmental science 833 implementation variation tunnel financial sustainability uncertainty sensitivity analysis Mechanics and Rock Engineering, from Theory to Practice IOP Publishing IOP Conf. Series: Earth and Environmental Science 833 (2021) 012170 doi:10.1088/1755-1315/833/1...

... pressure change (while confining pressure is maintained at a constant value). The variation of the calculated Biot coefficient values in relation to the amplitude of pressure variation in each test was analyzed. The tests for each sample were performed with small pressure steps in the beginning...

... rock engineering variation displacement Mechanics and Rock Engineering, from Theory to Practice IOP Publishing IOP Conf. Series: Earth and Environmental Science 833 (2021) 012152 doi:10.1088/1755-1315/833/1/012152 Effect of thermal cycles on rock cliff deformation. Monitoring and interpretation C...

... in order to take into account the variability of rockfall trajectories and provide a contribution for the estimation of the parameters within preliminary analyses based on the Cone Method. rock engineering variation variability percentile slenderness theory trajectory ramm geologist...

... portugal government geology discontinuity coefficient variability eurocode 7 practice iop publishing iop conf rock engineering theory environmental science 833 probability spatial variability variation strength calculation probabilistic calculation Mechanics and Rock Engineering, from...

... the AMF. structural geology strength specimen reservoir geomechanics maximum value reservoir characterization upstream oil & gas variation strength criteria drilling operation orientation plane tectonic fabric anisotropy weakness plane tectonised rockmass deformation kpa...

... of the REV is varied by changing the number or the radii of the embedded inclusions. As a first result, the two homogenization techniques are compared with reference to proximity to the numerical results. Moreover, it was noticed that the curves presenting the variation of effective bulk modulus with respect...

... injection and production wells. Reservoir Characterization heat exchanger area calibration geothermal reservoir Simulation simulator numerical simulation hydraulic fracturing enhanced geothermal reservoir variation operational parameter procedia engineering 191 Upstream Oil & Gas...

... researchers to go deeper into the details of the microcracking process in extreme ruptures. For example, laser techniques in experiments on transparent brittle polymethyl methacrylate (PMMA) specimens allowed visualizing the variation in contact area and interface slip associated with microcracking process [6...

... freezing for mine shaft construction. Reservoir Characterization pipeline application saturation frost heave freezing unfrozen state mechanical behaviour compressibility coefficient variation unfrozen water saturation procedia engineering 191 haxaire Upstream Oil & Gas solid phase...

... 10 000 towns in France. We have studied the physico-mechanical behaviour and ageing of two types of chalk in underground quarries in the Parisian Basin, France. The dolomitic chalk (Saint-Martin-Le-Nœud) exhibits variations in mechanical and physical properties with horizontal pillar depth, and both...

... geology wetting-induced behavior variation Osada flow in porous media case 2 evaporative condition Shirahama sandstone case 1 humidity change relative humidity change expansion deformation relative humidity Magnitude Rock Mechanics and Rock Engineering: From the Past to the Future...

... between actual value and their values is less than 15%. Apparent density is dependent on scale, but the Mauldon's estimators are independent of scale despite the variation in fracture length. For all joint sets, the difference of apparent areal intensity by samplings windows and circular estimator is less...

... and discuss its implications on the longterm performance and stability of historical structures in the region. Derinkuyu variation proceedings Aydan structural geology biological degradation Reservoir Characterization ulusay underground city Engineering erosion tuff sample Turkey...

... variation operation excavation storage permeability Rutqvist air tightness rock mass Energy Storage Rock Mechanics and Rock Engineering: From the Past to the Future Ulusay et al. (Eds) © 2016 Taylor & Francis Group, London, ISBN 978-1-138-03265-1 Pilot test of compressed air storage...