不同吹吸风口位置掘进面粉尘扩散规律数值模拟研究

Numerical simulation study of dust dispersion in excavation roadway with different wind tube position of pumping and pressing

根据气固两相流理论,针对井下掘进工作面前抽后压混合式通风的特点,采用计算流体力学的离散相模型(DPM)对不同吹吸风口位置掘进通风工作面的粉尘扩散规律进行了数值模拟研究.研究结果表明,在抽风量和压风量不变的情况下,改变吹吸风口位置,掘进工作面的粉尘浓度场也随之发生变化,吸风口和压风口离掘进头太近或太远,都不利于控制粉尘扩散和通风排尘,对于断面为8m2左右的掘进工作面,吸风口距离掘进头2～2.8m位置,吹风口距离掘进头18～22m位置,通风效果较好.

Based on the theory of gas - solid two - phase flow, and considering mine heading face characteristics and adopting computational fluid dynamics discrete phase model （DPM）, this paper makes the numerical simulation to calculate different pumping and pressing wind tube position in excavation roadway. The results show that, while changing pumping and pressing wind tube position, dust concentration in work face has also been changed, and it is disadvantageous in controlling dust dispersion and ventilation when considering pumping and pressing wind tube being apart from work face too far or too near. To the 8 m2 excavation roadway, adopting pumping wind tube being apart from work face 2 -2.8 m position and pressing wind tube being apart from work face 18 -22 m position, the ventilation is effective .