并列双U形通风系统配风比的模拟研究

Simulation Study of Side by Side Double U-ventilation at Different Primary and Secondary Air Distribution

对并列双U形通风系统在不同主辅配风比的情况下,采空区漏风场和瓦斯的分布进行了研究。经过分析得到:并列双U形通风系统通风能力强,对采空区瓦斯有显著的治理效果;在主辅进风配比不同时,对瓦斯的治理效果差别不大,同时上隅角和采空区瓦斯大量的随漏风流进入辅助回风巷,从而避免了上隅角瓦斯的超限;在配风比对采空区风流影响不大的情况下,考虑到风速对巷道的影响,配风比中主辅进风巷的风量最好保持在1.5∶1左右。

It studys the distribution of air leakage and gas field of this ventilation systems in different air volume distribution ratio. After comparative analysis he final results show: side by side double U-ventilation system has a strong ability of ventilation and has a significant treatment effect on gob gas;when the air volume distribution ratio is different, gas control effect has little difference, the gas of the upper corner and gob leak with a large amount of airflow into the assisted return airway, thus avoiding the corner gas overrun; With the wind hasing little effect on the goaf, taking into account the effects of wind speed on the roadway, it is good for the air volume in the primary and secondary inlet roadway kept for 1.5∶1.