摘要
通风的速度直接影响粉尘颗粒的扩散,这会降低掘进机司机的能见度,从而降低作业效率。采用CFD-DPM方法研究了不同通风风速下煤矿巷道风流流动及粉尘分散规律,结果表明,掘进机造成的阻塞会使气流携带粉尘颗粒沿着巷道壁从无序区域进入再循环区域,由于气流速度突然减小,掘进机后方区域的粉尘运移速度减慢;大量的粉尘颗粒被气流携带进入稳定区域,由于粉尘回流,剩余的粉尘被带到风筒的出口。因此,掘进机后方约5 m的区域以及靠近风筒出口处的区域粉尘浓度较高,且因强烈的卷吸作用,在通风速度超过16 m/s时,风筒出口附近的粉尘浓度随着通风速度的增加而增加。
The speed of ventilation will directly affect the dispersion of dust particles,which will reduce the visibility of the roadheader driver and lower the operational efficiency.The CFD-DPM method was used to study the air flow and dust dispersion law of coal mine roadway under different ventilation air speeds,and the results show that the obstruction caused by roadheader will cause the airflow to carry dust particles along the roadway wall from the disordered area into the recirculation area,and due to a sudden decrease in the airflow speed,the dust migration speed in the area behind the roadheader is slowed down;a large number of dust particles are carried by the airflow into the stable area.As the dust flows back,the remaining dust is carried to the outlet of the air duct.As a result,the area about 5 m behind the roadheader and the area near the outlet of the air duct contain high dust concentration,and the dust concentration near the outlet of the air duct increases with the increase of the ventilation speed when the ventilation speed is more than 16 m/s due to the strong entrainment effect.
作者
陈佩璜
CHEN Peihuang(Malan Mine Extraction Area,Xishan Coal and Electricity(Group)Co.,Ltd.,Taiyuan 030200,China)
出处
《陕西煤炭》
2025年第9期31-35,89,共6页
Shaanxi Coal
关键词
粉尘分散
通风风速
气固两相流
数值模拟
dust dispersion
ventilation air velocity
gas-solid two-phase flow
numerical simulation
