... elasticity modulus moisture content reservoir geomechanics strength Siltstone compression test triaxial compressive strength mechanical parameter uniaxial compressive strength rock sample fitting formula Reservoir Characterization Upstream Oil & Gas formula sandstone triaxial compression...

... Abstract An experimental study is conducted on sandstone under different confining and pore pressures through triaxial creep tests The creep properties of sandstone under different conditions are compared and analyzed The test results show that: in the case of same confining pressure, pore...

... Abstract Based on the concept of generalized plasticity, this study proposes a constitutive model for describing the time-dependent behavior and wetting deterioration of sandstone. The proposed model (1) exhibits nonlinear elasticity under hydrostatic and shear loading; (2) follows...

... Abstract True triaxial tests have been carried out on two porous sandstones, Coconino ( n =17.5%) and Bentheim ( n =24%) to investigate the effect of the intermediate principal stress (σ 2 ) on compressive strength, failure-plane angle and failure mode. These rocks were selected because...

... of the valleys. Meadows spread over the high terraces and plateau hills. gravel soil slope plane high slope structural geology geological disaster freeze-thaw deformation residual gravel soil slope mudstone sandstone soil slope Reservoir Characterization deposit conglomerate river...

... occurs due to bending stresses (Amini et al. 2009). However, another mode of toppling failure, which mainly developed in interbedded hard rock (i.e. sandstone) and soft rock (i.e. mudstone, shale and limestone) slope is very common in Three Gorges Reservoir region (Chen et al. 2004; Dong et al. 2010...

... uniaxial failure strength bedding plane sandstone strength anisotropy anisotropy ABSTRACT A series of uniaxial and triaxial tests are conducted on core samples of sandstone from Hunan highway region in China. The influence of the inherent anisotropy of sandstone on the mechanical...

... ABSTRACT Aseriesofpolyaxialcompressiontestsandindirecttensiontests withaxialconfinementsare performedtoassesstheeffectsoftheintermediateprincipalstressesontheelasticityand strengths of three types of sandstones. Over 50 rectangular shaped specimens (50x50x100 mm) are tested using a polyaxial...

... variation Deformational Characteristic shear stress volumetric strain dilation loading constitutive model Upstream Oil & Gas sandstone moduli deformation behavior hydrostatic stress Reservoir Characterization anisotropic degradation weak sandstone volumetric deformation...

... Reservoir Characterization classification longitudial wave velocity wave velocity structural geology Engineering rockmass nuclear power plant sandstone andesite basalt characteristic Upstream Oil & Gas weathered degree weathered tuff sandstone dynamic parameter tuff sandstone...

... were produced, had been selected. They were a sample of arkosic sandstone and a sample of polymict siltstone taken from two core boreholes of the diameter of 47.5 mm in the Ostrava- Karviná Coalfield. Because real rock samples, although taken from one borehole, show a considerably great variance...

..., andesite and sandstone) are performed. Based on the data obtained, some of the physico-mechanical parameters of the armourstones are evaluated for the long-term durability assessments, and they are compared with the field performance of the armourstones. 2 METHODS In order to predict the long-term...

... of three gorges shiplock slope in China, the numerical results agrees well with field measurements. Reservoir Characterization Engineering Upstream Oil & Gas interlayer input parameter reservoir simulation displacement Mayanpo slope excavation sandstone initial static loading...

... reservoir geomechanics wave velocity Deere uniaxial compressive strength Reservoir Characterization strength igneous rock point load index rock type Upstream Oil & Gas Miller sandstone deformability measurement laboratory test correlation rock strength compressive strength...

... the sandstone along the Alborz service tunnel which is currently excavated by a 5.2 m diameter Open TBM in Iran. 2 CONFIGURATION OF THE NUMERICAL MODEL Universal distinct element code (UDEC) is used for simulating the rock fragmentation mechanism by disc cutters. The key concepts of the DEM...

... reservoir geomechanics portal investigation Reservoir Characterization RMR highway tunnel structural geology strength parameter rock mass rock mass classification MPa limestone portal slope stability assessment flysch Upstream Oil & Gas tunnel sandstone agglomerate Shear...

... describes the strength and deformation behaviour of Jurong Formation sedimentary rocks in Singapore. In this study, uniaxial and triaxial compressive tests as well as indirect tensile tests had been carried out on different sedimentary rocks, i.e. siltstone, limestone, sandstone and mudstone. During...