... twinning and dislocation activity. The mechanical behaviour of carbonate rocks of a wide range of porosities has been documented by many previous studies [6–8]. Upstream Oil & Gas direct shear test shear displacement displacement experiment cip block ausama giwelli vertical stress...

..., aperture, filling, seepage, number of sets, block size and drill coring. Laboratory testing included: water content, porosity, density, absorption, swelling pressure, uniaxial compressive strength, point load test (PLT), Brazilian tensile strength (BTS) and direct shear test (DSH). A.L.T.E.A...

... element method particle procedia engineering 191 Upstream Oil & Gas direct tension test triaxial compression test Artificial Intelligence friction direct shear test rock mass propagation Energy Balance kinetic energy hydraulic fracturing Simulation different energy component increment...

... favourable, undisturbed specimens were directly retrieved from the gouge material. Laboratory tests on the infilling material included: grain-size distributions and direct shear tests on both undisturbed and reconstituted specimens. A limited number of large-scale in situ shear tests on filled...

... Characterization laboratory test biaxial compression test wellbore integrity numerical test direct shear test mechanical property matrix Wellbore Design strength strength parameter MPa investigation conglomeratic rock conglomerate Upstream Oil & Gas displacement deformability modulus Costa...

... were observed. At shallow injection intervals, where no seismicity was observed, horizontal faults are more likely to slip. The second approach, a velocity stepping direct shear test, showed that the friction coefficient of LYB shale (clay-rich) increases with increasing velocity for bedding parallel...

... of the stress dependent input parameters for pea gravel used as backfill. The input parameters have been calibrated using results from large oedometer tests and direct shear tests on a numerical oedometer test. To verify the obtained input parameters, a numerical shear test has been performed. It can be shown...

... the tilt test or the direct shear test conducted with a portable shearing device, or laboratory tests such as triaxial and shear tests (Schubert 2007). However, this paper only deals with direct shear tests carried out in the laboratory. Two main stress conditions under which the direct shear device...

... strength in direct shear tests. 1. Introduction The aim of this work is the description of the geotechnical properties of the volcanic materials existing in Arteara rock avalanche, located in Fataga ravine, in the south of Gran Canaria island (Canary Islands, Spain) (Figure 1). The geomorphology...

... with those obtained in direct shear tests carried out on large blocks. The rock mass in study is characterized by the dominant presence of carbonaceous phyllite, by the intense folding and weathering, by its ductile behavior and by presenting a dominant failure mode controlled by the rock mass properties...

... Micro Deval test on prismatic samples. The mechanical characterization used uniaxial compression tests and direct shear tests along open joints. An overview of the results obtained so far is presented in the next pages. Upstream Oil & Gas quartz direct shear test Reservoir...

... Abstract This paper investigates the progressive shear behavior and asperity degradation of rock joints in the direct shear test using PFC2D. PFC is a discrete element code in which the intact material is represented by assemblies of circular particles bonded together. Traditionally, joints...

... compressive tests, indirect- and direct tensile tests, direct shear tests and tilt tests. Besides these laboratory methods the site investi- gation program also included a number of measurements uncommon in ordinary site investigation programs. For instance were micro crack volume measurements per- formed...

... ABSTRACT: In order to evaluate the applicability of Acoustic Emission (AE) as an indicator of instability of active joints in dam structures, an extensive feasibility study was done on 40 joint samples. To this end, direct shear tests were conducted under different conditions (in various...

... Concrete plug replacement is a treatment method for faults in concrete gravity dam foundations. To investigate the effects of concrete plug installation on the shear strength of dam foundations, direct shear tests are carried out for rock models made of plaster. From the experimental results...

... properties of rock joints. No research, however, has ever been able to present the entire shear behavior, namely, the increase in the shear stress, the decrease (softening), and then the gradual arrival at the residual state. The authors previously performed direct shear tests on rock joints under constant...

... (Patton, 1966), that were measured with an automatic mechanical profilometer, the values of the angles of first displacement ~ obtained from a tilt test, and the values of i=arctg(t/O)-q,b obtained from direct shear tests. This allows one to write a relation between the value of the angles i, measured...

..., the peak friction angle will be equal to rPm which represents a lower bound. This lower bound, which is considerably higher than the friction angle obtained from saw-cut surfaces, is in agreement with most experimental results, where a lower bound of this magnitude is observed in most direct shear tests...

... was implemented on prepared ‘rough’ joints. Prisms of rock with areas 60 to 100 sq. cm. were split along pre-indented lines for direct shear testing. For torsion testing NX cores were initially drilled through the centre at a diameter. 3.1 Measurement of surface topography The surface topography of each...