Modeling and Simulation of Dust Diffusion Mechanism at the Belt Conveyor Transfer Point in Underground Coal Mine

Abstract

AbstractIn order to better control the diffusion of coal dust at the belt conveyor transfer point, it is explored that the air flow and dust movement laws in the coal mine roadway. A mathematical model on coal dust diffusion is established based on Euler–Lagrange model, and the physical model of the transfer point is established with SOLIDWORKS. With these models, simulations about the dust diffusion center on belt conveyor transfer point are carried out with Ansys Fluent. The results show that, with the influence of the two kinds of airflow, the coal dust is concentrated near the outlet of the windward side of the transfer point in the form of vortex, and there is a tendency to bypass the transfer point and spread to the side of the sidewalk. It is no longer evenly distributed along the roadway. Where the dust concentrated is the important position to fix dust removal equipment. The dust particle size and diffusion laws at the concentrate position are analyzed, with the increase of diffusion distance, the mass proportion of the particle size less than 10 μm increases. This means that the dust within the particle size range is not easy to settle, and appropriate measures should be taken to reduce its concentration.KeywordsCoal dustDiffusion mechanismModelingSimulationBelt conveyor transfer point