... 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...

.... For this 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 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 process...

... 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 point Rock...

... 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...

... load. Due to the comprehensive load, broken particles form in the fractures and play a role of proppant to prevent fractures from complete closure. Even if the dislocation of fracture surfaces disappears and re-aligns to each other, plastic deformation will still prop up aperture of the fracture. Based...

... and 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...

... 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: The stability...

... 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...

... 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...

... 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 and analyze...

... 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...

..., the 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...

... 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 observed, which...

... of 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...

... and with irregular rough profiles. They showed PFC2D (Particle Flow Code) is able to numerically reproduce the progressive shear behav- ior of rough fractures. Park & Song (2009) performed a study in PFC3D using the contact bond model on the relationship between the macro-response of a joint and the micro-parameters...

... and the effect of rock fracture roughness on the filtration and penetration mechanism was numerically investigated. The simulation 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. 1...

..., and show the main orientations of the particles in the core samples after plastic deformation. The results of the laboratory compression tests show a correlation between the shape and orientation of the deformation ellipse and the particle/matrix ratio and the applied pressures. On the basis...

... & 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 fracture behaviour...

... 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 main...