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Proceedings Papers

Paper presented at the ISRM European Rock Mechanics Symposium - EUROCK 2017, June 20–22, 2017
Paper Number: ISRM-EUROCK-2017-030
... values. In order to investigate this problem, numerical modeling was performed using the discrete element code (ITASCA Particle Flow Code, PFC), which has been proven as an effective tool to investigate rock engineering problems associated with hydraulic fracturing. The code presented in this study...
Proceedings Papers

Paper presented at the ISRM European Rock Mechanics Symposium - EUROCK 2017, June 20–22, 2017
Paper Number: ISRM-EUROCK-2017-056
... purpose, the code YADE Open DEM has been used. The rock mass is viewed as an assembly of bonded particles that interact through an elastic-brittle and frictional contact law. Interparticle breakage can occur by either tensile or shear mechanisms and interparticle friction is considered with respect to a...
Proceedings Papers

Paper presented at the ISRM European Rock Mechanics Symposium - EUROCK 2017, June 20–22, 2017
Paper Number: ISRM-EUROCK-2017-103
... the experimental study, a 2D mechanical model of the shear experiments was developed using Smoothed Particle Hydrodynamics (SPH), suitable for deformation processes involving very large strains. Numerical results were compared with the experimental data for a better understanding of local deformation...
Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 2016, August 29–31, 2016
Paper Number: ISRM-EUROCK-2016-001
... roof beam reservoir geomechanics tensioned rock bolt block assembly complex reservoir particle Reservoir Characterization Upstream Oil & Gas rock bolt algorithm fracture eastern end jointed rock mass stiffness linear inequality thrust line rock mass friction angle boon contact...
Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 2016, August 29–31, 2016
Paper Number: ISRM-EUROCK-2016-094
... 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 limestone...
Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 2016, August 29–31, 2016
Paper Number: ISRM-EUROCK-2016-190
... self-propped fracture cuboid fracture friction rough surface particle specimen fracture surface SRV Rock Mechanics and Rock Engineering: From the Past to the Future Ulusay et al. (Eds) © 2016 Taylor & Francis Group, London, ISBN 978-1-138-03265-1 Analysis of self-propped fractures during...
Proceedings Papers

Paper presented at the ISRM Regional Symposium - EUROCK 2015, October 7–10, 2015
Paper Number: ISRM-EUROCK-2015-113
... experimentally examined by involving the bound porewater between clay particles. The long-term deformation of the clay rocks is determined with triaxial creep tests on water-saturated samples at ambient temperature. Reponses of the clay rocks to humidity changes are examined by drying and wetting the samples...
Proceedings Papers

Paper presented at the ISRM Regional Symposium - EUROCK 2015, October 7–10, 2015
Paper Number: ISRM-EUROCK-2015-168
... displacement history point metals & mining complex reservoir internal dump Simulation coalbed methane rib pillar stability analysis particle Banara Hindu University coal rib dump material assembly Mining Engineering contact bond internal dragline dump slope angle dump slope ABSTRACT...
Proceedings Papers

Paper presented at the ISRM Regional Symposium - EUROCK 2015, October 7–10, 2015
Paper Number: ISRM-EUROCK-2015-149
... Abstract This paper presents a new numerical approach to modelling rock fracture and fragmentation by combining the advantages of the mesh-free smoothed particle hydrodynamic (SPH) method with a new continuum constitutive model with embedded cohesive cracks. The new constitutive model is...
Proceedings Papers

Paper presented at the ISRM Regional Symposium - EUROCK 2015, October 7–10, 2015
Paper Number: ISRM-EUROCK-2015-134
... Abstract For studying the main properties of poorly consolidated granular media typical for oil reservoirs we used the face-centered packing of elastic spheres interacting in accordance with the Hertz solution. Motion of a single ball in cooperation with neighboring particles is investigated...
Proceedings Papers

Paper presented at the ISRM Regional Symposium - EUROCK 2015, October 7–10, 2015
Paper Number: ISRM-EUROCK-2015-125
.... Al-Busaidi et al. 2005 and Shimizu et al. 2011), only Zhao et al. (2012) have investigated wing crack initiation and development from an inclined pre-existing flaw using finite element modeling (FEM). Here we use discrete element method based bonded particle model (Particle Flow Code 2D) to simulate...
Proceedings Papers

Paper presented at the ISRM Regional Symposium - EUROCK 2015, October 7–10, 2015
Paper Number: ISRM-EUROCK-2015-181
... al. (2011) demonstrated by using numerical models that the subsidence of strip pillar mining increases with the increase of mining depth. Li & Wang (2011) used PFC to simulate the process of subsidence and to calculate the distribution of contact force and displacement of ore particles, which...
Proceedings Papers

Paper presented at the ISRM Regional Symposium - EUROCK 2015, October 7–10, 2015
Paper Number: ISRM-EUROCK-2015-162
... comprehensive effect of rising high-conductivity particles and increasing water table will jointly lead to the flat or rising trend. 1 Introduction Earth resistivity observation is known as a resultful earthquake precursor method. In China, ground surface electrodes are widely applied in the apparent...
Proceedings Papers

Paper presented at the ISRM Regional Symposium - EUROCK 2015, October 7–10, 2015
Paper Number: ISRM-EUROCK-2015-132
... generates deformation ellipses of the total deformation component, the results show a correlation between the shape of the deformation ellipse, the applied load, the microstructure and the particle sizes of the different rock types. Based on the creation of deformation ellipses strain changes can be...
Proceedings Papers

Paper presented at the ISRM Regional Symposium - EUROCK 2014, May 27–29, 2014
Paper Number: ISRM-EUROCK-2014-142
... bonded particle models based on the Particle Discrete Element Method. Synthetic rock samples are generated and their static elastic properties are calibrated by manipulating microproperties (assembly organization and normal and shear contact stiffness). The static and dynamic properties of the rock cores...
Proceedings Papers

Paper presented at the ISRM Regional Symposium - EUROCK 2014, May 27–29, 2014
Paper Number: ISRM-EUROCK-2014-124
... by Asadi & Rasouli (2010, 2011), who presented an application of the contact bond model for rock joints with symmetric triangular profiles and with irregular rough profiles. They showed PFC 2D (Particle Flow Code) is able to numerically reproduce the progressive shear behavior of rough fractures...
Proceedings Papers

Paper presented at the ISRM Regional Symposium - EUROCK 2014, May 27–29, 2014
Paper Number: ISRM-EUROCK-2014-129
... results clearly shows that the effect of surface roughness of rock fracture on the movement of cement particles and the amount of injected cement particles is significant. Introduction Grouting is a widely used technique to seal and/or reduce permeability of fractured rock masses around underground...
Proceedings Papers

Paper presented at the ISRM Regional Symposium - EUROCK 2014, May 27–29, 2014
Paper Number: ISRM-EUROCK-2014-145
... performed under varying applied pressures on samples of different rock types. The hard rock samples were analyzed by the Intercept-Method, which generates deformation ellipses, and show the main orientations of the particles in the core samples after plastic deformation. The results of the laboratory...
Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 2013, October 23–26, 2013
Paper Number: ISRM-EUROCK-2013-135
... Upstream Oil & Gas sandstone reservoir simulation particle compression test lab test failure envelope triaxial compression test Wellbore Design numerical simulation investigation determination tensile strength Baumgarten konietzky 2010 different type triaxial test konietzky 2012...
Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 2013, October 23–26, 2013
Paper Number: ISRM-EUROCK-2013-073
... the optimum conditions for excavation, which could reduce the cost of developing new WJ technology. In this study, we focused on the Smoothed Particle Hydrodynamics (SPH) method, which is a type of particle method, for the numerical simulation of WJ excavation of soft rock saturated with water. The...

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