In the mine gas explosion

preventing the explosion by extinguishant will help to fundamentally eliminate the disastrous consequence of gas explosion. In this paper

we set up double nozzles on the explosion pipeline

and explore the discharge of N2 to achieve the explosion and extinguish the flame. For the straight pipe with surrounding sides inclosed

experiments are conducted with serial N2 pressures

but none of them can prevent the explosion from spreading along the pipe. Then

in this paper

an opening on lower surface of the pipe is set for venting. It can be observed in the explosion process that a large number of high-temperature air masses and premixed gas flow out from the opening

and continuously react outside the opening. Combined with lateral venting

when the left nozzle in the double nozzle does not spurt nitrogen

the explosions still can't be prevented no matter the right nozzle spurting N2 with various pressures. However

when the pressure of the left nozzle is 0.1 MPa and above

the explosions can be prevented. And the larger the N2 pressure

the more easily preventing the explosion and quenching the flame is. The first major reason for preventing explosion is to weaken the reaction in pipe by lateral venting. Also

lateral venting in the pipe to reduce the explosion speed of propagation

more nitrogen is ejected out and longer period of time is obtained to fully dilute the premixed gas. That is the second main reason for preventing the explosion and quenching the flame.