Simulation of dust diffusion in fully mechanized excavation face having large cross-section under FPNA ventilation condition

doi:10.16265/j.cnki.issn1003-3033.2017.02.023

Abstract

Abstract: In order to improve the effect of dust removal by ventilation in fully mechanized excavation face of large cross-section, a steady discrete phase model (DPM) was built in Fluent software for a vice inclined shaft, having an effective sectional area of 24.9 m² and an air rate of 1 500 m³/min,of Longwanggou Mine under far-pressing-near-absorption ventilation. It was used to research the effects of both the forced and exhaust ventilation opening positions and the pressure extraction ratio on the diffusion. The results show when the distance from the forced-ventilation opening to mechanized excavation face and the distance from the exhaust-ventilation opening to mechanized excavation face are respectively 27.5 m and 5.0 m, and the ratio of pressure air volume to extraction air volume is 1.2, the effect of dust extraction by combined ventilation is optimal. And moreover, results from the numerical simulation conform with the measured results on the spot.

Key words: excavation roadway of large cross-section, dust, far-pressing-near-absorption(FPNA), numerical simulation, relative spacing, pressure-extraction ration

CLC Number:

X964
TD714

XIAO Junfeng, XU Feng, FAN Shixing, LU Ping, SHEN Xue, CHEN Zhongwei. Simulation of dust diffusion in fully mechanized excavation face having large cross-section under FPNA ventilation condition[J]. China Safety Science Journal, 2017, 27(2): 127-132.

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