Influence of Initial Position of Sliding Device on Premixed Methane/air Gas Explosion Flame at Driving Face in Coal Mine

ABSTRACT

Many gas explosion accidents show that gas explosion can easily cause a large number of casualties and huge property losses in coal mines. Therefore, the sliding device is established to study its explosion suppression effect, and the influence of the initial position of the sliding device on the explosion is analyzed. The results show that when the sliding device is close to the ignition source, due to the strong reverse action of the spring, the sliding baffle has a reverse secondary acceleration movement, thus forming a crescent-shaped forward compression flame, forming a reverse acceleration inhibition effect and rapidly extinguishing, and this rapid reverse movement is the key technology of accelerating chain breaking and wall collision effect in methanation reaction. Generally speaking, the sliding device can effectively control the overpressure and can make the flame extinguish quickly. At the same time, the possibility of secondary fire and explosion caused by the spread of explosion in other areas is prevented. Thus, the sliding device has a good effect of explosion-proof and suppression in coal mines.

KEYWORDS:

• Initial position
• sliding device
• premixed methane/air gas
• explosion
• flame

Acknowledgments

This research was funded by the Natural Science Foundation of Chongqing (CN) (No. cstc2019jcyj-msxmX0324), the project of science and technology research program of Chongqing Education Commission of China (No. KJQN201801517), the graduate scientific research innovation project of Chongqing University of science and technology (No.YKJCX1920706, YKJCX1920707, YKJCX2020727, YKJCK2020736, YKJCX2020742) .Thanks.

Additional information

Funding

This work was supported by the Natural Science Foundation of Chongqing [No. cstc2019jcyj-msxmX0324]; Graduate scientific research innovation project of Chongqing University of science and technology [No.YKJCX1920706, YKJCX1920707, YKJCX2020727, YKJCK]; Science and technology research program of Chongqing Education Commission of China [No. KJQN201801517].