..., since strength for this orientation is greater than intermediate orientation. Such an anomalous result could be related to an increase in the roughness of the failure planes controlled either by the presence of larger fragments of protolith or by an asymmetry on the roughness of the weakness planes...

... and data is key to minimizing data uncertainties and managing difficult ground conditions. Further, design challenges in poor ground conditions associated with low material strengths and or very low rock mass quality with unfavourable boundary conditions are discussed and overviews of design approaches...

... and solutions (TBM, Mechanical and D&B) in sedimentary rocks. reservoir characterization upstream oil & gas support design structural geology rockmass metals & mining strength weakness plane rock strength reservoir geomechanics rock mechanics bedding sandstone stability tunnel...

... bond strength metals & mining strength rock mechanics eurock 2020 experimental result reservoir characterization thin spray-on liner interaction stiffness cohesive zone model international journal shear stress interface © International Society for Rock Mechanics and Rock Engineering...

... Abstract Mineralogical composition and microstructural features influence rock strength and their failure mechanisms. Crack initiation (CI) and crack damage (CD) are important processes of the failure mechanisms of rocks. Since CI is the lower limit of the long term strength of rocks at low...

... Abstract It is critical to obtain the rock strength along the wellbore to control drilling problems such as pipe sticking, tight hole, collapse and sand production. The purpose of this research is to predict the uniaxial compressive strength based on data of sonic travel time, formation...

... density, specific gravity, static compressive strength and elastic modulus values are also determined. Petrological studies of quartzite are carried out through X-ray diffraction (XRD) test and scanning electron microscope (SEM) test. In the SHPB tests, it is observed from the stress-strain response...

... conditions, and thus the potential for dynamic loads. Reservoir Characterization Upstream Oil & Gas metals & mining strength standardized regression coefficient coefficient machine learning structural geology correlation pillar factor safety Maleki mechanics Artificial...

... Characterization strength geomechanical characterization Upstream Oil & Gas outcrop discontinuity characterization sandstone coal seam solibida procedia engineering 191 enhanced geothermal system major principal stress discontinuity fault friction angle geothermal reservoir alber basin rock...

... Abstract The paper presents the use of advanced stochastic simulation techniques for estimating the strength behavior of rock materials. The Shore Rebound hardness was measured on fifty rock specimens coming from eleven different geological localities in Czech Republic. The dry unit weight...

... Abstract Based on laboratory testing of bedded specimens made of artificial geomaterial, meta-siltstone and schist subjected to uniaxial compression and triaxial compression by the Karman scheme, the deformation and strength characteristics of the materials are determined as functions...

... product metals & mining tensile stress China strength gob-side roadway roof tensile strength procedia engineering 191 roadway roof Procedia Engineering 191 ( 2017 ) 89 97 Available online at www.sciencedirect.com 1877-7058 © 2017 The Authors. Published by Elsevier Ltd. This is an open...

... specimens of small dimensions can considerably affect not only the surface properties of the specimens, but also their inner structure. structural geology AWJ application abrasive water jet reservoir geomechanics strength specimen cross-section Artificial Intelligence test specimen...

... Abstract For geothermal as a well as hydrocarbon wells the casing is cemented to ensure a good contact between casing and the rock mass and, more importantly, for preventing the contamination of water resources. Cement shall thus have sufficient strength to prevent collapse of unstable...

... Abstract Roof and rib falls are still a leading cause of injuries in underground coal mines. When numerical simulation method is adopted to study this phenomenon, the influence of regular laminations on strength and size effect should be carefully considered because rock mass of roof...

... Abstract Tensile strength of rocks is an important parameter in the design of underground structures and for various engineering applications. Lack of literature and rapid development of infrastructure in central region of India calls for a need to characterize the mechanical behaviour...

... and the external fixture to the excavation surface [2]. The reinforcing effect of a grouted bolt is by the longitudinal and shear displacement in the rock mass. Thus the load transfer capacity of the bolt is governed by the shear strengths developed between the rock/grout and the grout/bolt surface [3]. Pull-out...

... and/or between mineral grains in inhomogeneous rocks. A fracture process of numerical specimens which are prepared using X-ray CT image of African granites is studied. The analysis of material parameters, such as Young's modulus and tensile strength of minerals contained in the granites, is conducted to examine...

...‚kowski deformation upper elastic limit stress-strain curve strength deviation investigation elastic limit Procedia Engineering 191 ( 2017 ) 134 141 1877-7058 © 2017 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY-NC-ND license (httpcreativecommons.org...

... Abstract The Uniaxial Compressive Strength (UCS) of intact rocks is an essential index of strength in rock engineering. Laboratory based direct compressive strength estimation may be problematic, as obtaining fresh samples is not always feasible. Thus, the aim of indirect methods index test...