Simulation of Dust Migration and Concentration Change Law during Powered Support Advance in Fully Mechanized Top-coal Caving Face Based on Fluent
WU Lirong
WANG Dan
Abstract：The variation law of the dust concentration in the change process of the wind speed during support advance, the height of dust source and the dust concentration at the dust source was simulated with Fluent software by taking No. 1109 fully mechanized caving face of 3 up seam in Gaozhuang Coal Mine as an example and based on the theory of gas-solid two-phase flow. Research showed that the dust concentration reduced with the increase of wind speed, and the dust concentration in the turbulent region was less affected by the wind speed;the dust concentration at the same location decreased with the increase of the height of dust source and the dust concentration in the turbulent region was less affected by the height of the dust source;when the mass flow rate at the dust source was merely changed, the change trend of the dust concentration in the direction of z axis was consistent;since the dust concentration in the turbulent region was subjected to great influence, the change of the dust concentration at the locations in different distance to the coal wall was different. The variation law of the dust concentration obtained by numerical simulation was basically coincident with the measured results, Based on the comprehensive consideration of the influence of the wind speed and the mass flow rate, research was made on the fitting function of dust concentration distribution during support advance operation.
Keywords：powered support advance operationga-solid two-phase flowdust concentrationnumerical simulation
Publication Date：2015-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：5( 29-33 )