... Abstract Given the results of triaxial tests, regressions are commonly used to evaluate the parameters of failure criteria that model intact rock strength and to perform statistical inferences used to evaluate characteristic values defined in EC7. Statistical robustness of these inferences...

... Reservoir Characterization Modeling & Simulation 13th international congress reservoir geomechanics Upstream Oil & Gas correlation Chicontepec basin rock strength strength porosity laboratory Poisson rock mechanics isrm13 grain size distribution new correlation compressive...

...OBTAINING ROBUST ESTIMATES OF ROCK STRENGTH FOR ROCK ENGINEERING DESIGN *N. Bozorgzadeh, M. Dolowy-Busch, and J. P. Harrison University of Toronto 170 College Street Toronto, Canada M5S 3E3 (*Corresponding author: [email protected]) Innovations in Applied and Theoretical Rock...

... ABSTRACT Traditional 2D failure criteria in the form of .s 1 = f (s 3 ) are usually inaccurate when employed under 3D applications. However, they successfully capture the important limiting effect of s 3 which dictates the threshold of the rock strength, while s 2 affects strength...

...Harmonising Rock Engineering and the Environment Qian & Zhou (eds) © 2012 Taylor & Francis Group, London, ISBN 978-0-415-80444-8 Rock strength and failure: Some common and uncommon issues A.J. Gonzalez-Garcia School of Engineering, National University of Colombia, Bogota D.C ABSTRACT...

... ABSTRACT A database of core-derived mechanical properties measurements has been used to develop new empirical correlations relating rock strength and compressibility to associated petrographic and petrophysical data. Automated fitting procedures translate these empirical observations...

... ABSTRACT The addition of water to rock is known to change its material properties. These changes can be both beneficial as well as detrimental in terms of rock strength, stability of rock excavations and the process of mechanical rock excavation. This paper presents the results of a study...

... Reservoir Characterization wellbore stability criterion input parameter rock property determination mud weight procedure stability Upstream Oil & Gas pore pressure correlation rock strength wellbore-stability analysis sensitivity investigation optimum mud weight Harmonising Rock...

... autonomously learns the intrinsic interconnections between rock strength parameters and geochemistry and uses these interconnections to improve the quality of the geological model. We demonstrate the principles of our approach by fusing drill monitoring data from closely spaced blast hole drilling at an open...

... coefficient rock strength dip angle rock mass classification contact zone Daya Bay equation Jinzhou 11th Congress of the International Society for Rock Mechanics Ribeiro e Sousa, Olalla & Grossmann (eds) © 2007 Taylor & Francis Group, London, ISBN 978-0-415-45084-3 Discontinuity distribution...

... frequency and joint stiffness. Using the example of the Melbourne Mudstone, this paper compares approaches using empirical rules based on intact rock strength, laboratory testing, insitu field testing, semi-quantitative assessment techniques based on rock mass classification and back analyses. L'evaluation...

... performance and increased costs. Examples of situations in which fracturing of rock at very low stress levels has been observed will be described. This will include details or estimates of the in situ stress magnitudes and the rock strengths involved. La brisure de roche sous faibles contraintes peut...

... Empirical equations established for estimating the rock strength of the working face based on the cutting forces of a tunnel boring machines (TBM) are further examined and discussed with respect to the dominant factors affecting TBM performance. Constants in the equations are related to TBM...

... A new loading apparatus was fabricated and used to conduct true-triaxial compression tests on KTB amphibolite, a crystalline basement rock. Tests in dry jacketed samples reveal that the intermediate principal stress has a significant effect on the onset of dilatancy and on rock strength...

... with five minimized factors of intact rock strength, RQD, spacing, persistence and roughness of discontinuities. RMR est un des procedes de la classification du roc qui sont generalement utilises. Mais RMR s'appuie sur l'experience et se absolument soumet à l'experience d'ingenieur. Il est donc necessaire...

... The authors developed the TBM Excavation Control System (the TBM Navigator), in order to realize the advanced observational construction. During the excavation using this system, the rock strength value is immediately calculated from the TBM driving data as an index of rock properties...

... of Tokyo, Japan I -1 ' t (1'~ I , r. ~ t , ~- ., ABSTRACf: A method for estimating rock strength using TBM cutting force is proposed based on experimental findings. The cal-, culated rock strength coincides well with those obtained using other methods, such as bedrock survey, Schmidt-hammer rebound...

...Test of rock strength with irregular rock pieces by using the point load method Mesure de la resistance des roches par la methode de charge ponctuelle sur des roches irregulieres Felsstarkemessungen mit Hilfe der Punktbelastungsmethode bei unregelmaBigen GesteinsstClcken WANG XIANGHOU. Guizhou...

... Upstream Oil & Gas scale effect correlation main result fragment cutting spherical indenter index test mechanical property reservoir geomechanics strength Rock mechanics diameter size sample Reservoir Characterization rock fragment dimension rock strength epoxy resin...

... but also in hard rock, slurry walls were unable to substitute the grouting technique completely. Reservoir Characterization strength mechanism reservoir geomechanics hard rock possible treatment rock strength clamshell structural geology hydraulic gradient percussive tool trench...