... 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: Basaltic rocks display a wide range of porosity depending on size of vesicles as a result of their complex genesis. Predicting of strength of rock material have crucial importance for design of engineering structures such as dams, foundations, tunnels, and other engineering projects...

... ABSTRACT: To eliminate the holding and gluing problems making the direct tensile strength test hard to be applied, a new method of testing rock material specimens prepared using lathe machine to make the dog bone shape is assessed whether it could be applied to determine accurate direct...

... and defor-mability characteristics of rocks. The progressive weathering in rocks lowers directly the quality of the rock materials and masses (Noble 1977, Fookes et al. 1988, Oyama et. al 1998, Yohta 1999, Wyllie 1999, Topal 2002, Arikan et. al. 2007, Marques et al. 2010). Reservoir Characterization...

... the planar failure mechanisms of slopes. Three types of rock materials were modeled by using bonded particle model procedures in PFC. The results show that the location of the rock bridges predominantly affect the failure mechanisms of rock slopes as well as the discontinuity length. All rock materials (e.g...

... rock material Abstract The improvement of PCD cutting tools requires a better understanding of rock cutting mechanism. For the moment, the study of this mechanism is based on laboratory tests and numerical modeling. For the numerical aspect, distinct element method seems to be more efficient...

... metals & mining strength Reservoir Characterization Engineering damage variable rock fatigue damage Wellbore Design cyclic loading amplitude rock material deformation Adelaide loading loading condition fatigue damage fatigue life Upstream Oil & Gas rock fatigue behavior...

... contact. The joint stiffnesses (kn and ks) were calculated using the bulk and shear moduli of the rock material so that they are set to a factor times the equivalent stiffness of the stiffest neighboring zone. The bulk and shear moduli were calculated using the Young s modulus and Poisson's ratio...

...Rock Engineering and Rock Mechanics: Structures in and on Rock Masses Alejano, Perucho, Olalla & Jiménez (Eds) © 2014 Taylor & Francis Group, London, 978-1-138-00149-7 Effect of loading rate on fracture behaviour of rock materials Q.B. Zhang & Y. Zou École Polytechnique Fédérale de Lausanne (EPFL...

...) as a suggested method for deter- mining the tensile strength of rock materials (ISRM 2007). The Brazilian test (splitting tension test) is per- formed by applying a concentrated compressive load across the diameter of a disc specimen. The tensile strengths of brittle materials like rock and concrete...

... Abstract The paper takes the issue of susceptibility of rock materials used in historic and contemporary buildings to long-term salt crystallization. The influence of long-term action of salt crystallizing from water solutions on the rock material was studied by means of artificial accelerated...

... equipment that allows varying the speed of 7 rpm to 238 rpm. This study could be implemented in wide variety of rock materials and thus target it according to their lifetime in the project. With varying the wear levels it was observed increasing weight loss until the inertia moment holding the specimens...

...-Brown strength criterion has been the most well-known and most frequently used one, because: (a) it was developed specifically for rock materials and rock masses; (b) its input parameters can be determined from routine uncon- fined compression tests, mineralogical examination, and discontinuity...

... Engineering marble investigation brittle rock rock material deformation triaxial test Von Karman recalculation Karman equation 2. Fundamental rock mechanics 2.1 Rock testing and material properties Rock Mechanics in Civil and Environmental Engineering Zhao, Labiouse, Dudt & Mathier (eds) © 2010...

... and mechanical properties of carbonate rock material depend more on mineral and lithological composition, occurrence of micro–fractures, texture, structure and diagenetic processes than on weathering. On the contrary, the elaborated data display a great dependence of engineering–geological properties...

... toughness and tensile strength. Moreover the critical mesh size can be determined by using the proposed method. Finally, frac- turing law used in CDM-FEM is also studied through the method. fracturing process of rock materials at micro/ meso scope. FEM methods for fracturing proc- ess simulation could...

... mechanism loading reservoir geomechanics strength material property AE event numerical experiment model stress level Coalescence rock specimen fracture characterization cyclic loading Simulation specimen rock material propagation Eurock 2005 -Impact of Human Activity on the Geological...

... Its production exceeds a limit of 200,000 cubic meters All month, otherwise it is classified as the small size. All quarries of large sizes are limestone quarries and their fragments are mainly used as a raw product in the portland cement industry. MANAGEMENT PLAN FOR ROCK MATERIALS Since Thailand...

... Shearing stresses and normal tensile stresses play both a decisive role in fracturing and brittle of rock material. Based on this hypothesis, a novel strength criterion was developed in one the earlier works of the author. In the criterion, a certain parameter v'' occurs which depends...

... The composite element concept is introduced in this paper firstly, then the explicit hollow rock bolt element model is developed which comprises rock material, bolt material, bolt-rock interface. The main advantage of the new model is that it can be incorporated into the conventional finite...