Influence of Long Pressure and Short Suction Ventilation Parameters on Air Flow Field and Dust Migration in Driving Face

Yuannan Zheng (), Bo Ren and Guofeng Yu
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Yuannan Zheng: State Key Laboratory for Safe Mining of Deep Coal Resources and Environment Protection, Huainan 232000, China
Bo Ren: State Key Laboratory for Safe Mining of Deep Coal Resources and Environment Protection, Huainan 232000, China
Guofeng Yu: State Key Laboratory for Safe Mining of Deep Coal Resources and Environment Protection, Huainan 232000, China

Sustainability, 2024, vol. 16, issue 17, 1-21

Abstract: A combination of similar tests and numerical simulation was used to study the distribution of the air flow field and the dust field in the driving face under the conditions of long pressure and short suction ventilation. The results show that the air flow field is divided into return, jet, and vortex zones. When the distance (L) is 1.6 m, the wind speed (V a ) is 8 m/s, and the ratio of pumped air volume to pressure air volume (Q) is 0.8, the total and exhaled dust concentration (T d , R d , T p , and R p ) at the driver’s and pedestrian’s position were the lowest. According to the grey correlation analysis, the importance of factors affecting T d and T p is ranked as L > V a > Q, R d is ranked as V a > L > Q, and R p is as follows: V a > Q > L. The increase in V a and the decrease in L have a significant effect on the expulsion of exhaled dust.

Keywords: driving face; numerical simulation; long pressure; short pumping; wind field; dust transport (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2024
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