Analysis of physical properties of granular materials on their numerical models (2D case)

Sergey Markov,Vasiliy Klintsov,Maxim Tyulenev,Stefan Vöth,S Vöth,A Abay,L Sobik,M Cehlár,N Demirel,J Janocko,Y Tan,D Szurgacz

doi:10.1051/e3sconf/202131501018

Abstract

The paper describes a method for determining the density and specific surface of the package of rock particles represented by discs with the size corresponding to the size of the rock fragments of real dump massifs (2D case). The packing method of the particles corresponds to the schemes of dumping used in open-pit mining - areal and peripheral ones. The influence of boundaries, in which the dump is located, on the physical characteristics of this massif - density and porosity - is revealed. It was revealed that the way of formation of the bulk of particles affects its density, especially at the boundaries of the massif. The massif of particles formed in accordance with the area technology of dumping has a denser composition and is less affected by the effect of its boundaries than the massif formed in accordance with the peripheral technology of dumping. The applied method of determining the physical characteristics of the bulk medium differs from the statistical methods (e.g., Monte Carlo) and is well-proven for static media, such as dumps and filtering massifs in open-pit mining.

Highlights

The physical properties of technogenic rock massifs are determined by one of the most essential factors - the geometrical structure of the pore space and the solid phase
The relative density of granular media in the 2D case is the ratio of the total area of the circles SK to the total area covered by the circles and the space between them S0:
The result of the simulation routine is a matrix of generalized particle coordinates, which is a numerical analogue of the stochastic structure of irregularly packed circles, which forms ensembles with different local values of structural and physical-technical parameters

Summary

Introduction

The physical properties of technogenic rock massifs are determined by one of the most essential factors - the geometrical structure of the pore space and the solid phase. The state of the system of solid particles is determined by its geometry: the size of the particles, their shape and way of packing. The parameters of mutual arrangement of particles (intercenter distances, orientation, angles between segments connecting particle centers, coordination number, etc.) have a decisive influence on macroscopic characteristics of the medium (bulk density, specific surface, filtration characteristics, carrying capacity, etc.) In this regard, there is a question of determining these parameters in order to quickly assess and manage the state of the technogenic rock massifs of overburden bedrock

Methods

Results

Results and Discussion

Conclusions