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拓扑分析瓦斯爆炸频发点的局部通风系统模型,建立了利用弱面玻璃板模拟通风设施的管路实验模型.研究了瓦斯爆炸超压波在实验模型中传播时,遇不同位置弱面板的超压峰值变化规律;分析了弱面板破坏前后超压峰值的变化规律及分布特征,并对冲击波后弱面板破坏的片度分布结果进行了统计.确定了实验模型中同一爆源点爆炸冲击波对不同位置弱面板的破坏程度,分析了爆炸产物的组分,模拟计算了超压波衰减的量化特征,为风网模型中通风设施的防爆配置提供指导.提出了在关键通风设施位置预置常开自动风门;瓦斯爆炸冲击波破坏原有通风设施后泄压,预置常开风门自动关闭,从而恢复通风系统的新思路.
Topological analysis of local ventilation system model of gas explosion frequent points, the establishment of the use of weak glass panel simulation of ventilation pipeline experimental model. Study of gas explosion in the experimental model of overpressure propagation in the experimental case of weak panels with different positions The variation law and the distribution characteristic of the overpressure peak before and after the failure of the weak panel were analyzed and the results of the distribution of the degree of fragmentation of the weak panel after the shock wave were analyzed.The results show that the explosion shock wave of the same explosion point in the experimental model is different We analyzed the components of the explosive products, calculated the quantitative characteristics of the overpressure attenuation, and provided guidance for the explosion-proof configuration of the ventilation system in the wind-net model. Automatic damper; gas explosion shock wave damage to the original vent pressure relief device, the preset often open the door automatically closed to restore the ventilation system of new ideas.