CFD-DEM numerical study on coal dust pollution law of coal transfer point in underground coal mine

Abstract

To grasp the relation between dust pollution and air flow velocity distribution at a transfer point of coalbelt, taking No.2 transfer point of Mengdong Energy Mindong No.1 mine 00 working face as the research object, using CFD-DEM, finite element method, the k-ε turbulence model and COMSOL software, the numerical model of the three-dimensional distribution of the air flow of No.2 transfer point of the mine is established. Based on the field test data, the influence mechanism of serious dust pollution in the transfer point is analyzed. Results show that the mixing of the air flow of belt conveyor and that of the two lanes is the cause of the phenomenon of vortex and disorder of the air flow at the transfer point. The three-dimensional spatial and temporal distribution of dust diffusion with different particle sizes of 5 m to 50 m was obtained. The control plan that the external destruction vortex, internal reasonable arrangement, dry and wet dusting is proposed, and the wet dust control scheme was designed.

Keywords

• coal transport transfer point
• dust pollution
• air flow distribution
• cfd-dem
• wet dust control