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Keywords: particle
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Proceedings Papers

Paper presented at the ISRM International Symposium - 10th Asian Rock Mechanics Symposium, October 29–November 3, 2018
Paper Number: ISRM-ARMS10-2018-090
... strength and elastic modulus are thermally-dependent - for example, the uniaxial compressive strength of rock will decrease with increasing temperature, as a result of thermally-induced cracks between mineral particles. However, thermally-induced cracks and the micro-mechanisms of rock damage are difficult...
Proceedings Papers

Paper presented at the ISRM International Symposium - 10th Asian Rock Mechanics Symposium, October 29–November 3, 2018
Paper Number: ISRM-ARMS10-2018-041
... cavity. Based on DEM, the Particle Flow Code is used to simulate the rock salt with interlayers. A novel hybrid DEM model is proposed, incorporating the rheological behavior of the pure rock salt, and the brittle character of interbedded mudstone. This model is capable of representing the macro...
Proceedings Papers

Paper presented at the ISRM International Symposium - 10th Asian Rock Mechanics Symposium, October 29–November 3, 2018
Paper Number: ISRM-ARMS10-2018-016
... Characterization circular ore pass diameter ore size distribution ore pass metals & mining isrm international symposium asian rock mechanics symposium 29 discrete element method ore pass hang-up particle vertical ore pass square ore pass Simulation cohesion cross-sectional shape friction...
Proceedings Papers

Paper presented at the ISRM International Symposium - 10th Asian Rock Mechanics Symposium, October 29–November 3, 2018
Paper Number: ISRM-ARMS10-2018-074
... microcosmic parameters and fracturing curves, it is believed that the normal and shear stiffness of sandstone particles are larger than those of shaly ones. To achieve the same stress, shaly ones need larger displacement, requiring more hold pressure time. Besides, the Poisson's ratio and strong plasticity...
Proceedings Papers

Paper presented at the ISRM International Symposium - 10th Asian Rock Mechanics Symposium, October 29–November 3, 2018
Paper Number: ISRM-ARMS10-2018-119
.... Methodology In the study, a series of semi-circular bend (SCB) specimens with the ISRM-suggested dimensions were numerically manufactured using the Particle Flow Code (PFC) to measure the fracture toughness of rock under elevated temperatures (up to 600°C). Fig.1 shows a representative numerical sample used...
Proceedings Papers

Paper presented at the ISRM International Symposium - 8th Asian Rock Mechanics Symposium, October 14–16, 2014
Paper Number: ISRM-ARMS8-2014-111
...@cv.tottori-u.ac.jp (corresponding author s E-mail) Abstract A three-dimensional distinct lattice spring method is a numerical model in which matter is discretized into individual particles connected by springs. The connected springs include a normal spring and a shear spring for each pair of particles...
Proceedings Papers

Paper presented at the ISRM International Symposium - 8th Asian Rock Mechanics Symposium, October 14–16, 2014
Paper Number: ISRM-ARMS8-2014-233
...-based grout through rock fractures, the two-dimensional numerical model of coupled Computational Fluid Dynamics and the Distinct Element Method (CFD-DEM) was developed and the effect of particle adsorption on the filtration and penetration mechanism was numerically investigated. The simulation results...
Proceedings Papers

Paper presented at the ISRM International Symposium - 8th Asian Rock Mechanics Symposium, October 14–16, 2014
Paper Number: ISRM-ARMS8-2014-088
... Abstract The paper presents a numerical procedure based on Smoothed Particle Hydrodynamics (SPH) framework to analyze the fracture and fragmentation process of rock medium under dynamic stress wave followed by gas expansion. To analyze the dynamic fracture mechanism related to blast-induced...
Proceedings Papers

Paper presented at the ISRM International Symposium - 8th Asian Rock Mechanics Symposium, October 14–16, 2014
Paper Number: ISRM-ARMS8-2014-064
... * mcweng@nuk.edu.tw Abstract This study proposes a biconcave-shaped bonding model for distinct element method (DEM) to simulate cementation efficacy between two circular particles in geo-materials such as intact sedimentary rock. Instead of original parallel bonding model between particles, the proposed...
Proceedings Papers

Paper presented at the ISRM International Symposium - 8th Asian Rock Mechanics Symposium, October 14–16, 2014
Paper Number: ISRM-ARMS8-2014-293
... Abstract We investigated spatial and temporal the distribution of trace metals and sedimentary particles in order to identify the relationship between benthic foraminifera and trace metals pollution within Gunnamatta Bay, Port Hacking Estuary, NSW, Australia. Risk assessments of surface...
Proceedings Papers

Paper presented at the ISRM International Symposium - 8th Asian Rock Mechanics Symposium, October 14–16, 2014
Paper Number: ISRM-ARMS8-2014-230
... raised some problems in this 2D approach. The flow of fluid and particles in the depth direction can not be represented in the two-dimensional simulation. Then, the simulated grout injection completely stopped instantaneously when particles formed an arch structure and clogging occurs. In actual grout...
Proceedings Papers

Paper presented at the ISRM International Symposium - 8th Asian Rock Mechanics Symposium, October 14–16, 2014
Paper Number: ISRM-ARMS8-2014-290
... specimen discrete element method reservoir geomechanics asian rock mechanics symposium arms8 deformational behavior material deterioration deformation Reservoir Characterization strength particle physical model test slope deformation Upstream Oil & Gas Simulation gravitational deformation...
Proceedings Papers

Paper presented at the ISRM Regional Symposium - 7th Asian Rock Mechanics Symposium, October 15–19, 2012
Paper Number: ISRM-ARMS7-2012-167
... ABSTRACT Cement is a basic material for dam foundation grouting. Cement particles have nonspherical and irregular shapes. Based on the findings in Particle Engineering, spherical particles can be effectively injected into cracks than nonspherical particles. If the cement particles...
Proceedings Papers

Paper presented at the ISRM Regional Symposium - 7th Asian Rock Mechanics Symposium, October 15–19, 2012
Paper Number: ISRM-ARMS7-2012-163
... particles for closing water paths. Quantitative investigation is made through laboratory tests and numerical simulation implementing a finite difference method (FDM) and a moving particle semi-implicit (MPS) method. As a result, a model is proposed of grouting mechanism using cement particles...
Proceedings Papers

Paper presented at the ISRM Regional Symposium - 7th Asian Rock Mechanics Symposium, October 15–19, 2012
Paper Number: ISRM-ARMS7-2012-125
... ABSTRACT This study focuses on a series of CFD (computational fluid dynamics) simulations that enable the optimization of drill bit design by assessing internal rock particle and air flow paths. We used the Star-CCM+ code to simulate the multi-phase flow (i.e., rock particle discharge...
Proceedings Papers

Paper presented at the ISRM Regional Symposium - 7th Asian Rock Mechanics Symposium, October 15–19, 2012
Paper Number: ISRM-ARMS7-2012-022
... degrees. In addition, there is a rise in the stress ratio as the overconsolidation ratio increases. overconsolidation direct shear test wet sample Upstream Oil & Gas dry sample shear strength property snail fossil Reservoir Characterization carbonate sand particle vertical effective...
Proceedings Papers

Paper presented at the ISRM Regional Symposium - 7th Asian Rock Mechanics Symposium, October 15–19, 2012
Paper Number: ISRM-ARMS7-2012-005
... ABSTRACT This paper presents a review of a systematic research program for understanding scale and stress effects on transport behaviours of fractured crystalline rocks, using a hybrid discrete element and particle tracking approach. The motivation is the importance of understanding stress...
Proceedings Papers

Paper presented at the ISRM Regional Symposium - 7th Asian Rock Mechanics Symposium, October 15–19, 2012
Paper Number: ISRM-ARMS7-2012-088
... dlsm model rock material stiffness Reservoir Characterization particle deformation shear spring uniaxial tensile micro constitutive law constitutive law Implementation of non-linear constitutive model for Distinct Lattice Spring Model G.F. Zhaoa* and N. Khalilib a Lecturer, The University...
Proceedings Papers

Paper presented at the ISRM Regional Symposium - 7th Asian Rock Mechanics Symposium, October 15–19, 2012
Paper Number: ISRM-ARMS7-2012-085
... mechanism experiment fracture growth pattern unconsolidated sand specimen fracturing materials specimen Injection Rate Upstream Oil & Gas viscosity unconsolidated sand model MPa fluid viscosity hydraulic fracturing Simulation particle unconsolidated sand Cundall The distinct element...
Proceedings Papers

Paper presented at the ISRM Regional Symposium - 7th Asian Rock Mechanics Symposium, October 15–19, 2012
Paper Number: ISRM-ARMS7-2012-053
... a discrete element code PFC2D. Reservoir Characterization strength particle detonation pressure reservoir geomechanics underground space crack generation tensile stress Upstream Oil & Gas numerical analysis method free face algorithm stiffness Engineering crack expansion principal...

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