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Keywords: particle
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Proceedings Papers

Paper presented at the 15th ISRM Congress, October 9–14, 2023
Paper Number: ISRM-15CONGRESS-2023-343
... and environmental problems. The present study aims at modeling erosion in dense slurries by using computational fluid dynamics simulation. We use dense discrete particle model which takes into account both particle-fluid and particle-particle interactions. Numerical modeling is first conducted for a slurry...
Proceedings Papers

Paper presented at the 15th ISRM Congress, October 9–14, 2023
Paper Number: ISRM-15CONGRESS-2023-351
... of particles (at molecular level) as a function of potential-energy barriers, which restrict the movements of particles in the system. Following Gutiérrez-Ch et al. (2021), the equation of the RPT can be simplified as: 2 (1) with: = 2 (2) = 2 1 1 (3) where represents the sliding velocity at each contact...
Proceedings Papers

Paper presented at the 15th ISRM Congress, October 9–14, 2023
Paper Number: ISRM-15CONGRESS-2023-171
... ABSTRACT: Fragmental rockfall is one kind of common geological disaster in mountainous areas. In this paper, the discrete element method, particle flow code (PFC) is used to simulate the impact and fracture process of rock mass, analysis the impact process of rock mass at different falling...
Proceedings Papers

Paper presented at the 15th ISRM Congress, October 9–14, 2023
Paper Number: ISRM-15CONGRESS-2023-191
... in fluid migration patterns within this area, we have developed a discrete element model (DEM) of the Yangsan fault network using the Particle Flow Code (PFC2D) software. Spatial distributions of local Coulomb stress changes are in good agreement with stress changes reported in literature. Furthermore...
Proceedings Papers

Paper presented at the 15th ISRM Congress, October 9–14, 2023
Paper Number: ISRM-15CONGRESS-2023-333
... deformations in the simulation of geomechanical materials (Soga et al . 2018). Within these methods, those without meshes and those based on particles, have been continuously developed and applied to various geomechanical problems with large deformations. In particular, the Material Point Method (Sulsky et...
Proceedings Papers

Paper presented at the 15th ISRM Congress, October 9–14, 2023
Paper Number: ISRM-15CONGRESS-2023-285
..., velocity field. 1 INTRODUCTION Granular matter is a conglomerate of visible rigid particles in which friction is the predominant interaction force. One of the phenomena of growing interest in this area is the flow in silos with a basal opening, where the particles discharge under gravity, also known...
Proceedings Papers

Paper presented at the 15th ISRM Congress, October 9–14, 2023
Paper Number: ISRM-15CONGRESS-2023-315
...-Based Model (GBM) for the simulation of transversely isotropic rocks. The model introduces Rigid Body Spring Network bonds and a fictitious stress approach into the Discrete Element Method in order to generate the anisotropic elastic behavior and utilizes breakable particles to manifest cleavage failure...
Proceedings Papers

Paper presented at the 15th ISRM Congress, October 9–14, 2023
Paper Number: ISRM-15CONGRESS-2023-320
... geological subdiscipline university modeling excavation geologist reservoir geomechanics excavation continuum voronoi block model cvbm strength field-scale simulation continuum voronoi block model-cvbm particle mpa upstream oil & gas simulation creighton granite pillar displacement...
Proceedings Papers

Paper presented at the 14th ISRM Congress, September 13–18, 2019
Paper Number: ISRM-14CONGRESS-2019-211
... metals & mining stope mechanism barricade backfill interaction upstream oil & gas waste management construction reservoir characterization paste backfill self-weight consolidation backfill placement particle figure preparation stability binder journal frictional...
Proceedings Papers

Paper presented at the 14th ISRM Congress, September 13–18, 2019
Paper Number: ISRM-14CONGRESS-2019-208
... specimen alterability resistance compactness river guadalajara quarry reservoir characterization tajo hydrographic confederation laboratory dolomite spain upstream oil & gas particle construction alcorlo dam porosity cedex fragmentation x-ray fluorescence Abstract...
Proceedings Papers

Paper presented at the 14th ISRM Congress, September 13–18, 2019
Paper Number: ISRM-14CONGRESS-2019-237
... process and phenomenon of #RB-6. 1994 228_14455.indd 1994 24/08/19 8:44 PM In comparison with the laboratory tests of impact rockburst and particle distribution shown in Figures 6, 7, 8 and Table 3, it can be found that the dynamic loads can indeed trigger serious rockburst behavior accompanied by a large...
Proceedings Papers

Paper presented at the 14th ISRM Congress, September 13–18, 2019
Paper Number: ISRM-14CONGRESS-2019-223
... AWJ velocity = vJ 1+ (mA + (Eq. mW ) 2): (2) where vAJ = AWJ velocity (m/s); = momentum transfer coefficient related to the momentum transfer between the high velocity WJ at the nozzle and the incoming abrasive particles; mA = abrasive mass flow rate (kg/s); mW = water mass flow rate (kg/s). Both...
Proceedings Papers

Paper presented at the 14th ISRM Congress, September 13–18, 2019
Paper Number: ISRM-14CONGRESS-2019-210
... interacts with each other, which changes the deformation and strength of the fractured rock, and also redistributes the stress field and seepage field in fractured rock (Kong & Wang 2018a, Xu et al. 2018, Yao et al. 2018). Water flows in the gaps and spaces in the fractured rock, and drives fine particles...
Proceedings Papers

Paper presented at the 14th ISRM Congress, September 13–18, 2019
Paper Number: ISRM-14CONGRESS-2019-228
... regulations and used in the state, two of these responsible for the form of an index of coarse aggregate (NBR 7809/08 Digital Pachymeter Method and DNER-ME 86/94 Reducer Sieve Method) and two responsible for determining the lamellarity of the particle (DAER-EL 108/01 - Lamellarity Index, ASTM d 4791/15...
Proceedings Papers

Paper presented at the 14th ISRM Congress, September 13–18, 2019
Paper Number: ISRM-14CONGRESS-2019-256
... a hollow cylindrical metallic chamber, which rotates around a horizontal axis, promoting the shock of the particles of rock between them. The chamber is partially submerged which allows the particles to contact the water, favoring disintegration due to wear. In the study the variation of wear energy...
Proceedings Papers

Paper presented at the 14th ISRM Congress, September 13–18, 2019
Paper Number: ISRM-14CONGRESS-2019-251
... and shear strength of infilled joints under varying conditions. A consideration of all of the models is the ratio of the infill thickness (t) to the asperity height (a) or the t/a ratio. The infill material may originate from sources such as; the degradation of the wall surfaces, transportation of particles...
Proceedings Papers

Paper presented at the 14th ISRM Congress, September 13–18, 2019
Paper Number: ISRM-14CONGRESS-2019-299
... energy entropy of the rock specimen, we recorded the strain energy of each particle and the number of cracks at different time steps. The results show that the energy entropy increases with the increase in the number of cracks. Thus, the change in energy entropy can be used to predict crack propagation...
Proceedings Papers

Paper presented at the 14th ISRM Congress, September 13–18, 2019
Paper Number: ISRM-14CONGRESS-2019-323
... element, in fact, those points besides evolving translations and rotations as well. Consequently, the static fields appear in the relationship between couple-stress and gradient of rotation, such action introduces implicitly the dimensions and shape of the particles in constitutive relations, which allows...
Proceedings Papers

Paper presented at the 14th ISRM Congress, September 13–18, 2019
Paper Number: ISRM-14CONGRESS-2019-325
... University of Technology, Guangzhou, Guangdong, China Rui Chen* School of Highway, Chang an University, Xi an, Shanxi, China ABSTRACT: Based on the Discrete Element Method (DEM), a three-dimensional particle flow code (PFC3D) was used to simulate the penetration process of the large-diameter steel cylinder...

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