... Abstract Carrier material (mixture of viscous fluid and fine particles, CM) circulation system was proposed to lift up deep sea mineral resources. This study focuses on appropriate mixing proportions of CM for lifting up heavier and coarser ores. The results of model tests of ore lifting...

... for modelling deformable structures such as welded meshes. This work presents a discrete framework for the modelling of rock-filled gabions. The gabion module is modelled as an assembly of deformable cylindrical elements, while the filling material is represented using rigid aggregates of spherical particles...

... particles, whose interactions are simulated with a hybrid mixture of the Flat Joint Contact Model (FJCM) and the Linear Model (LM) contact models; the RPT is implemented into DEM models using a Visual C++ function. Results show that the DEM plus RPT combination can suitably reproduce the tunnel convergences...

... 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...

.... 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...

... 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...

... 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...

...- ing both particles (Fig. 10b). The calculation of the analytic centre can be solved using well-established convex optimisation procedures. The contact normal can be calculated by first defining inside the poly- hedron an inner potential particle whose corners are rounded (cf. Houlsby 2009), so...

... 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...

... 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...

... Reservoir Characterization Thickness metals & mining Simulation Upstream Oil & Gas surface subsidence physical model simulation block size elsevier ldt granular material numerical simulation geometry thongprapha particle subsidence geomechanics research unit American...

..., 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...

... reservoir geomechanics calibration rock mass vibration propagation Reservoir Characterization dynamic property shear contact stiffness normal stiffness contact stiffness Upstream Oil & Gas assembly evolution stiffness discrete element particle model structural geology particle...

... displacement particle current limitation shear test Upstream Oil & Gas strength smooth joint contact smooth joint segment Reservoir Characterization roughness rock joint asperity stiffness shear displacement laboratory contact model ball 1600 peak shear strength shear...

... 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...