瓦斯积聚量及爆炸距离对风机和防爆门的影响研究

Research on influence of gas accumulation amount and explosion distance on fan and explosion-proof door

为揭示瓦斯积聚量及瓦斯爆炸距离对风机和防爆门的影响机制,利用Fluent模拟软件,结合宁煤集团羊场湾矿的实际情况,在构建三维数学物理模型的基础上,开展不同瓦斯积聚量(56.52,113.04,169.56,226.08 m3)和不同爆炸距离(20,30,50,70 m)条件下的模拟研究。研究结果表明:风机和防爆门处超压峰值随瓦斯积聚量增加而增加,均呈线性关系,瓦斯积聚量为56.52 m3时风机处超压峰值为0.260 MPa,小于风机破坏荷载0.306 MPa;考虑安全系数前提下,当瓦斯积聚量超过56.52 m3时防爆门应开启保护风机;在确定瓦斯积聚量为56.52 m3基础上,分析不同爆炸距离对风机和防爆门影响,由模拟结果可知,风机和防爆门处超压峰值随爆炸距离增加而降低,均呈幂函数关系。研究成果可为瓦斯爆炸对风机和防爆门的影响研究提供指导。

In order to reveal the influence mechanism of gas accumulation amount and gas explosion distance on the fan and explosion-proof door,the three-dimensional mathematical and physical models were constructed by using Fluent simulation software combined with the actual situation of Yangchangwan coal mine of Ningmei Group,and the simulation research under different gas accumulation amounts(56.52,113.04,169.56 and 226.08 m3)and different explosion distances(20,30,50 and 70 m)was conducted.The results showed that the peak overpressure at the fan and the explosion-proof door increased with the increase of gas accumulation amout,and both presented the linear relationship.When the gas accumulation amount was 56.52 m3,the peak overpressure at the fan was 0.260 MPa,which was less than the failure load of fan as 0.306 MPa.Under the premise of considering the safety factor,when the gas accumulation amount exceeded 56.52 m3,the explosion-proof door should be opened to protect the fan.Based on the determination of gas accumulation amount as 56.52 m3,the influence of different explosion distances on the fan and explosion-proof door was analyzed,and the results showed that the peak overpressures at the fan and the explosion-proof door decreased with the increase of explosion distance,and both presented the power function relationship.The research results provide important guidance for the study about the influence of gas explosion on the fan and explosion-proof door.