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运用Fluent软件对压入式局部通风倾斜巷道掘进工作面瓦斯分布进行了模拟。比较了向上掘进和向下掘进巷道中瓦斯分布的不同;分析了风量对向上、向下倾斜掘进巷道中瓦斯分布的影响;研究了消除瓦斯高浓度区域向上、向下倾斜巷道所需风量的差别。结果表明:当条件相同,即风筒出口平均风速、倾斜角度和迎头瓦斯涌出量相同时,向上倾斜掘进工作面的高浓度瓦斯区域比向下倾斜时的高浓度瓦斯区域大;当回风流中瓦斯平均浓度不变时,随着风量和瓦斯涌出量的增加,由于风量的增加使到达迎头的风速变大,使空气和瓦斯混合得更加均匀,向上倾斜掘进工作面的高浓度瓦斯区域和向下倾斜的高浓度瓦斯区域之间的差距逐渐减小。消除高浓度瓦斯区域所需的风筒出口风量向上倾斜掘进巷道比向下倾斜掘进巷道大。
Fluent software was used to simulate the gas distribution in the driving tunnel with partially ventilated inclined roadways. The differences of gas distribution in upwardly and downwardly heading roadways are compared. The influence of air volume on the gas distribution in the upward and downward tilting roadways is analyzed. The differences of the required air volume for upward and downward sloping roadways in high gas concentration areas are studied . The results show that when the conditions are the same, that is, the average wind speed, tilt angle and head gas emission are the same at the outlet of the wind tunnel, the gas field with high concentration in upward inclined face is larger than the gas zone with high concentration in downward slope. When the average gas concentration is constant, with the increase of wind volume and gas emission, the wind speed reaching the head becomes larger due to the increase of the air volume, the air and gas are mixed more evenly, and the high-concentration gas region of the working face is inclined upward And the downward slope of the high-concentration gas area between the gradual decrease in the gap. Elimination of high concentrations of gas required for the export area of the air duct up tilt roadway tunneling than the downward sloping roadway.