Abstract Ventilation facilities could easily be destroyed by gas explosion in a coal mine and usually lead to the cascade collapse of the entire ventilation system. Altering the ventilation facilities could increase the value of the overpressure peak and the propagation speed of the shock waves. The attenuation law for blast waves in restricted roadway networks was analysed, and calculation models for the blast wave overpressure and attenuation of the smoke flow velocity in tunnelling roadways were derived. An overpressure relief air door with a magnetic lock was then designed. This air door is opened by the action of the blast overpressure to relieve the pressure in a large section. The air door is automatically reset after the shock wave passes and closes under its load force and body weight. The system has the function of continuous automatic pressure relief and reset, providing support for efficient emergency rescue operations.

中文翻译：

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瓦斯爆炸及自动避震装置通风设施超压波特性试验研究

摘要 煤矿瓦斯爆炸很容易破坏通风设施，通常会导致整个通风系统的级联坍塌。改变通风设施可以增加超压峰值和冲击波的传播速度。分析了受限巷道网络中冲击波的衰减规律，推导出了冲击波超压和隧道巷道烟流速度衰减的计算模型。然后设计了带有磁力锁的超压释放气门。这扇风门是通过鼓风超压的作用打开的，以释放大段的压力。风门在冲击波通过后自动复位并在其负载力和体重作用下关闭。