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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。
In the case of parallel dual U-shaped ventilation system with different main and auxiliary wind ratios, the distribution of air leakage and gas in the gob area was studied. After analysis, it is found that the parallel double U-shaped ventilation system has strong ventilation ability and significant effect on the gas in the goaf; when the ratio of the main air and the auxiliary air is different, the effect on gas control is not much different. At the same time, A large amount of gas in the empty area enters into the auxiliary return air passage with the leakage air flow so as to avoid the over limit of the gas in the upper corner. Under the situation that the air distribution ratio has little effect on the air flow in the goaf, taking into consideration the influence of wind speed on the roadway, The main wind into the wind than the main air intake lane to maintain the best in 1.5: 1 or so.