Abstract
This paper investigated the effectiveness of a vent burst door in isolating the shock waves of gas explosions in coal mines and to reveal the mechanisms of gas explosion overpressure. A 17.5 m × φ 0.63 m columnar explosion test duct with a similar shape to the roadways in coal mines was designed. Explosion overpressure propagation characteristics and the effects of methane concentration at different locations along the duct with and without a vent burst door were experimentally investigated. The results demonstrate that the vent burst door plays a significant role in sealing the explosion area and isolating the explosion propagation. A properly designed vent burst door is a promising technique for suppressing and isolating multiple and continuous gas explosions and is poised to have a significant positive impact on improving the safety of coal mines in China and all over the world.
Highlights
The intense shock wave generated causes a large number of casualties and property losses in the event of a gas explosion in a coal mine
A series of experiments investigating the characteristics of gas explosions were carried out to test the performance of a rapid sealing vent burst door designed in this study
The suppression of shock wave propagation is evident at the rear part of the explosion duct
Summary
It is well known that the resources of coal in China are abundant. accidents due to coal mine gas explosions frequently occur because of the harsh production environment, which seriously threatens the safety of coal mine production. The intense shock wave generated causes a large number of casualties and property losses in the event of a gas explosion in a coal mine.it is necessary to study how to isolate and effectively vent the propagation of the shock wave due to gas explosion and reliably mitigate the hazards of gas explosions.5Extensive studies have been done on the suppression, isolation, and venting of gas explosions. In explosion suppression, scholars have studied the effects of induction charged water mist, nitrogen and ABC powder, pristine Palygorskite powders, powder aerosol-inhibitors, foam ceramics, non-premixed nitrogen, and wire mesh on the suppression of the propagation of premixed methane–air gas explosion. It is necessary to study how to isolate and effectively vent the propagation of the shock wave due to gas explosion and reliably mitigate the hazards of gas explosions.. Extensive studies have been done on the suppression, isolation, and venting of gas explosions.. In studies investigating the isolation of explosions and strategies such as isolation water tubs, water bags, water mist, and rock dust barriers have been proposed. Systems such as those consisting of fast-closing slide valves and rotary locks have been investigated to effectively serve as an isolation barrier in the event of gas explosion. Venting systems have been a topic of focus, and studies on the vent pressure, vent burst pressure, methane concentration, ignition location, vent size and congestion, configuration (closed or vented), and vent area have been performed to prevent and reduce the consequences of gas explosions
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
