... stability analysis, the choice of strength theory is also very important. Drucker-Prager yield criterion or Mohr-Coulomb strength theory is currently used. The former cannot represent the unequal tensile and compressive effects of geotechnical materials, while the latter cannot reflect the influence...

... structural geology correlation seismic event energy release Upstream Oil & Gas isrm international symposium asian rock mechanics symposium 29 cohesive element criterion numerical simulation rock mass Reservoir Characterization Simulation Magnitude Beck levkovitch constitutive...

... Upstream Oil & Gas criterion isrm international symposium asian rock mechanics symposium 29 friction angle orientation failure condition cohesion failure plane Reservoir Characterization strength variation critical plane approach distribution function stress condition...

... strength criterion is proposed for anisotropic rocks and jointed rock mass. The proposed criterion is an extension of Jaeger two-dimensional (2D) anisotropic criterion into three-dimension (3D) using Mogi-Coulomb strength criterion. It is concluded from the study that the most critical anisotropic plane...

... that, overall, fitting results with Hoek-Brown (HB) criteria are more accurate than those with the Mohr-Coulomb (MC) criterion for the dynamic compression test results. Finding in the test confirms that HB strength envelope under static conditions can be used to describe dynamic strength behaviors, and only...

... criterion for the intact rock , and the failure plane will cut across the bedding planes. At intermediate angles, failure will occur along a bedding plane, at a stress determined by the strength parameters of the bedding plane. Data were analyzed from a set of triaxial ( 2 3) compression tests conducted...

... was established based on the Weibull distribution of mesoscopic element strength and by adopting the Generalized Zhang-Zhu (GZZ) criterion as the distribution parameter. The GZZ criterion is a three-dimensional Hoek-Brown strength criterion taking account of the influence of the intermediate principal stress...

... Abstract To consider the roughness effect on shear strength and deformation of rock joint, this research proposed a joint model for the discrete element method. The background theory of the proposed model is based on Barton's shear strength criterion which is widely used to describe non...

.... cement mix Bremen katterbach GIN envelope criterion penetrability limit el tani grout path hydraulic fracturing asian rock mechanics symposium arms8 flow rate envelope fracture Upstream Oil & Gas Thickness borehole radius october 2014 penetration span 8th Asian Rock Mechanics...

..., particularly under high temperatures. To incorporate the thermal and rate (time-dependent) effects into a strength criterion the distortional strain energy at dilation of the salt is calculated as a function of the mean strain energy density. Finite difference analyses (FLAC 4.0) are also performed...

... tends to increase with confining pressure. When the major principal stress is normal to the joint planes the specimen strength is greatest and the deformation modulus is lowest. Hoek-Brown strength criterion can effectively describe the specimen strengths under all configurations. The m and s...

... at the perimeter of the injected hole, and the location has been confirmed similar with the laboratory test results where fracture generates parallel to direction of maximum principal stress. Reservoir Characterization Wellbore Design maximum principal stress block sample wellbore integrity criterion...

... designing. Reservoir Characterization Upstream Oil & Gas consequent rock slope reservoir geomechanics criterion failure mode reservoir simulation Gao lower edge uplift rock formation stability Artificial Intelligence asian rock mechanics symposium arms8 numerical simulation slope...

... model early stage machine learning kanayama accuracy prediction result settlement prediction Artificial Intelligence criterion measurement record criteria prediction measurement data 8th Asian Rock Mechanics Symposium ARMS8 14-16 October 2014, Sapporo, Japan Examination for Predicting...

... CRITERIA Numerous criteria have been proposed over the years to describe the shear failure of rocks (Andreev, 1995). The oldest such criterion, the so-called Mohr-Coulomb criterion, asserts that, at failure, the maximum principal stress 1 is a linearly increasing function of the minimum principal stress...

... Borehole Stability Analysis in Transversely Isotropic Rock using Anisotropic failure criterion Hanna Kima and Ki-Bok Minb* a Graduate Student, Seoul National University, Seoul, Korea b Assistant Professor, Seoul National University, Seoul, Korea *Corresponding Author s E-mail: kbmin@snu.ac.kr...

... Reservoir Characterization strength hoek-brown failure surface failure surface intermediate principal stress Upstream Oil & Gas Pietruszczak failure criterion rock failure criterion new criterion hoek-brown failure criterion criterion hoek-brown criterion test data equation...

... blasthole pressure elmalık section Aydan far-field stress reservoir geomechanics in-situ stress state inference MPa excavation in-situ stress criterion stress state blasthole stress measurement negative image dalgıç damage zone tunnel Inferring In-situ Stresses from Damage around...

... yield criterion in a creep model is the other important aim of this paper, which eliminates estimating specific equivalent Mohr-Coulomb strength parameters from the Hoek-Brown parameters. The equations related to the proposed model are derived and then, to reach a numerical solution of the equations...

... stability status will get worse and time-delayed failure may happen for the over-balanced drilling. wellbore integrity failure criteria normalized radial distance tangential stress drilling scenario Wellbore Design pore pressure drucker-prager criterion wellbore wall radial distance pore...