... triaxial system. In present study, seven anisotropic angles (0°, 15°, 30°, 45°, 60°, 75°, and 90°) were simulated on a cylindrical specimen of diameter 50mm and length of 100mm based on the natural foliation of rock. From the experimental results and analysis based on Mohr-Coulomb and modified Hoek-Brown...

... oil & gas reservoir geomechanics volcanology strength europe government geological subdiscipline geologist italy government university bologna spizzichino figure strength criterion mohr-coulomb strength criterion geology reservoir characterization antro della sibilla specimen...

... government reservoir geomechanics inclination fracture geology china government geological subdiscipline deformation doi fahimifar rock mechanic time-dependent deformation creep deformation geologist rock type reservoir characterization specimen fractional derivative deep geological disposal...

... characteristics of AE signals emitted during fracturing of meter-scale concrete specimens. For comparison, uniaxial compression tests (UCT) and Goodman jack (GJ) tests in a 1.3 m-long concrete block were conducted while acquiring the AE signals using low-frequency AE sensors. The results showed that a sharp...

... of the andesite was examined using the previous results of strength and short-term creep tests with a tuff. Then, the results of long-term creep tests with the tuff were used for comparative discussion with those of the short-term creep tests. japan government loading-rate dependence specimen andesite...

..., and others. structural geology igneous rock shear displacement upstream oil & gas geologist mpa rock type reservoir characterization figure 4 india government geological subdiscipline kpa asia government reservoir geomechanics shear strength characterization asperity mold specimen...

... Disc (CCNBD) specimens or Semi-Circular Bending (SCB) tests (Aggelis et al., 2013; Guo & Wong, 2021; Guo & Zhao, 2022; Nasseri et al., 2006; Yang et al., 2022). However, the Rise Angle (RA) versus the Average Frequency (AF) relationship during fracture evolution has been largely underutilized...

... relies on the practitioner's experience. This is challenging in veined rocks that exhibit significant variability in the results. To reduce this uncertainty, this study investigates the influence of intravein grain-scale geometric heterogeneity and orientation on the emergent veined specimen strength...

... tectonics well logging thermal conductivity structural geology porosity reservoir characterization kyoto university figure 2 probe transmitter specimen log analysis lava equation autobrecciated lava alteration geological subdiscipline correlation clinker doi thermal diffusivity 15th...

... conducted on 300×500 mm specimens, one planar steel joint and two natural and two tensile induced rock fractures. Design targets, e.g. system to maintain undisturbed fractures up to testing and high system stiffnesses to achieve well-controlled shear tests, were verified by the experiments. A new optical...

... was developed for the laboratory study of such stress states in rock salt. Cylindrical hollow rock salt test specimens are loaded mechanically with an axial, circumferential and internal gas pressure. The axial stress reduction leads to a rupture at different stress differences between axial and gas pressure...

...). sedimentary rock rock type reservoir geomechanics strength geology netherlands government hardness doi uniaxial compression strength carbonate rock uniaxial compressive strength geological subdiscipline static young geologist basu equation specimen procedure europe government reservoir...

... pressures and displacements at the boundary of the test specimen were monitored. An exhaustive analysis of test results revealed that the deformation modulus is more sensitive to varying in-situ stress ratio than joint orientations. The modulus is found to decrease with increasing stress ratio. In addition...

... conditions. geology wellbore integrity geological subdiscipline upstream oil & gas specimen reservoir characterization asia government south korea government strength lbdi apparatus long bar drop impact roughness geologist wellbore design reservoir geomechanics shear strength...

... geomechanics strength matrix fragment specimen calcite matrix unwelded breccia classification equation bimrock engineering indentation upstream oil & gas breccia reservoir characterization geological hammer uniaxial compressive strength journal excavation derive 15th ISRM Congress...

... reservoir surveillance thermal conductivity experiment figure 2 conductivity production control reservoir characterization relationship specimen mineral composition expedition 322 mpa rock type production monitoring porosity nankai trough seismogenic zone experiment international ocean...

... method investigation sedimentary rock structural geology norway government deposit tirana triaxial compression strength specimen graph representation 15th ISRM Congress 2023 & 72nd Geomechanics Colloquium. Schubert & Kluckner (eds.) © ÖGG Skavica Hydropower plant, one of the most important...

... ABSTRACT: The swelling behavior of rocks can be significantly affected by variations in moisture history, particularly through cyclic wetting and drying. The oedometer swelling test is widely utilized to assess the swelling characteristics of rock specimens. In this study, a comparison...

... ABSTRACT: The recently developed stochastic approach to discontinuity shear strength (StADSS) avoids scale effects by predicting peak and residual shear strength using full scale discontinuity data. StADSS has been applied to mortar replicas of perfectly matched specimens in the laboratory...

...). Following the work of Alejano et al. (2017) and Pérez-Rey et al. (2020), the present paper presents the baseline results of the basic friction angles obtained from tilt tests on saw-cut planar joints on rock specimens subjected to different thermal ageing, namely 300°C and 700°C, and considering ambient...