采用脉冲通风治理回采面上隅角瓦斯积聚

Application of Pulse Ventilation for Controlling Gas Ac -cumu lation at Upper Corner Angle of Coal Face

分析了脉冲通风的射流对周围高浓度瓦斯的卷吸稀释特性及其横穿巷道主风流时的弯曲变形特征,阐明了射流脉冲通风对回采工作面上隅角积聚瓦斯的柔性排放作用,讨论了风机旋转频率对射流的影响。现场应用结果表明,射流脉冲通风对治理上隅角瓦斯积聚具有良好的效果。

The paper analyzed the features of pulse ventilation in drawing and diluting surrounding high -concentration gas and deforming and the curving characteristics of pulse ventilation while crossing over the main airflow of coal face,expounded the gentle discharging effect of pulse ventilation on the accumulat-ed gas at the upper corner angle of coal face,and discussed the influence of the fan's rotation frequency on the jet.The on-the-spot application showed that it is very effective for pulse ventilation in prevention and control of accumulated gas at the upper corner angle of coal face.