... as key evaluation parameters, taking into account domestic and foreign cases, the importance of rock engineering, and the existence of international standard testing methods. Their characteristics and the distribution range of the domestic parameters are investigated. In this study, two types of granite...

... ABSTRACT: This paper presents a numerical method to predict the temperature weakening effects on granite rock. Thermally induced cracking is modelled in the continuum sense by using a damage-viscoplasticity model based on the rounded Rankine surface. The governing thermo-mechanical problem...

... ABSTRACT: All kinds of fracture discontinuities in granitic host rock of high level radioactive waste (HLW) repository not only degrade the engineering characteristics of rock mass, but also constitute potential groundwater seepage channels and nuclide migration channels. During repository...

... sedimentary rock structural geology coal mining mineral africa government flow in porous media petroleum geology czechia government pore granite porosimetry mudstone economic geology micropore mesopore mudrock zambia government europe government reservoir characterization adsorption...

... ABSTRACT: Response of thermally treated granites are analyzed by several authors for processes like geothermal energy extraction, underground disposal nuclear waste, energy storage and structures exposed to fires. Although the conducted research helps to increase our understanding...

... rock mechanic granite mining science international journal poisson griffith criterion validity initiation generalized griffith criterion 15th ISRM Congress 2023 & 72nd Geomechanics Colloquium. Schubert & Kluckner (eds.) © ÖGG On the crack initiation location in the Brazilian test...

... ABSTRACT: This paper investigates the predictability of the strength loss of igneous rocks treated with microwave energy. First microwave treatment tests were performed at 6 kW power for the duration of 120s on the core samples of nine different igneous rocks such as granite, syenite...

... ABSTRACT: This study investigates the effect of microwave treatment on the Cerchar abrasivity index (CAI) of igneous rocks such as granite, syenite, and gabbro. First the mineral contents and percentages of each rock were determined. Then, microwave treatment was applied on the specimens...

... ABSTRACT: This paper studies the evolution of physical and mechanical properties of 46 cubic samples of a granite widely used in the UNESCO World Heritage of the north of Portugal pre-treated at different temperatures (between 105 and 700 °C) and cooled under different conditions (i.e., air...

... series of numerical simulations with a 3D distinct element code (3DEC), replicating DTS tests carried out on specimens presenting five H/D ratios (0.5, 1, 1.5, 2, 2.5, and 3). The study is complemented with laboratory DTS tests in granite. The results herein presented indicate that H/D ratios greater...

... reservoir characterization strength ae waveform proportion reservoir geomechanics mechanism compression frequency specimen jointed granite granite specimen acoustic emission loading frequency characteristic distinction wellbore design granite waveform jointed granite specimen...

... in independent directions in one probe position in the borehole so that all values of the stress tensor can be determined. structural geology reservoir characterization gneiss granite reservoir geomechanics ccbo probe deformation plane rock mechanic upstream oil & gas metals & mining...

... upstream oil & gas orientation texture mineral neutron diffraction anisotropy westerly granite reservoir characterization elastic anisotropy reservoir geomechanics symmetry granite preferred orientation heated westerly granite plagioclase mpa projection orthographic...

... Abstract Ornamental stones cover all kind of rock types, most common limestone, marble, granite and soapstone. The production involves two main operations–extraction of blocks from a bedrock and processing of slabs and other finished products. This study describes wire cutting tests at two...

... the shear behaviour of natural jointed granitic rocks and to compare their direct shear strength test results with the results obtained from artificially created replicas of the original granitic rock surfaces. Matching and unmatching discontinuity surfaces were analysed, both without infill material...

... edges. In this study, a BBM of Creighton granite was developed and the input parameters were calibrated to match a wide range of laboratory-derived attributes. Special attention has been paid to the post-yield behavior while accounting for the heterogeneous nature of the rock matrix. The calibrated BBM...

... methods), building from solutions using simple mechanics, to more complex models. reservoir simulation propagation sensitivity verification upstream oil & gas strength rock mechanic tunnel hydraulic fracturing granite calibration irazu fracture procedure tensile strength stepwise...

... result in spalling and branching of secondary fractures. hydraulic fracturing progressively granite injection protocol upstream oil & gas zimmermann injection procedure experiment hard rock laboratory stephansson cyclic injection stimulation seismicity reduction zang pocheon...

... the elevating pore pressure or the far-reaching poroelastic effects. This study experimentally investigated the fault stability under a critical shear state during fluid injection. Both the artificial smooth and irregular granite fault samples were tested. The results showed that four possible stability states...

..., various tests were carried out at temperatures ranging from 20 to 80°C. The results show by increasing the temperature of granite samples, their tensile strengths were decreased, post-peak stresses were dropped, and macroscopic tensile fracture surfaces became more obvious. The microcosmic tensile...