Numerical Simulation Research on Gas-Dust Flow Field of Forced-Exhausted Hybrid Ventilation in Whole Rock Mechanized Heading Face

Abstract:

Euler-Euler two-fluid model was used to construct control equations of gas-solid two-phase flow, based on SIMPLE algorithm of collocated grid and FLUENT software, the pressure distribution of air-flowing field and dust field diffusion in fully-mechanized excavation face with different air-draft volume were simulated. The results show that with the increase of exhausted dust ability, diffusion intensity of producing dust pollution in driving head constantly decreases. Compared to air-draft volume of 320m³/min, when it is 600m³/min, the average dust concentration at the driver and whole section positions respectively decrease 51.28% and 56.51%, and high-concentration dust diffusion distance of the other workers position section decrease from 13.6m to 8.5m. Engineering Application indicates that the measured dust concentration is basically anastomosed with simulation result. When air-draft volume of dedusting fan is 600m³/min and dust control system with air curtain formed by forced fan drum is used, the dedusting rates of total coal dust and respirable dust on spot are respectively 95.1% and 96.1%, which achieves a great dedusting effect.

• Periodical: Applied Mechanics and Materials (Volumes 336-338)
• Pages: 873-879
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.336-338.873
• Online since: July 2013
• Authors: Gang Zhou, De Ming Wang, Wei Min Cheng, Sen Cao
• Keywords: Dust Diffusion Law, Forced-Exhausted Hybrid Ventilation, Numerical Simulation, Pressure Distribution of Air-Flowing, Whole Rock Mechanized Heading Face

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