Experimental Study on the Influence of Different Coal Species on Gas and Coal Dust Explosion

JING Guoxun; SHAO Hongyuan; WU Yulou; GUO Shaoshuai; LIU Chuang; ZHANG Shengqi

Safety in Coal Mines > 2020 > 51(5): 1-5.

JING Guoxun, SHAO Hongyuan, WU Yulou, GUO Shaoshuai, LIU Chuang, ZHANG Shengqi. Experimental Study on the Influence of Different Coal Species on Gas and Coal Dust Explosion[J]. Safety in Coal Mines, 2020, 51(5): 1-5.

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Experimental Study on the Influence of Different Coal Species on Gas and Coal Dust Explosion

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Published Date: May 19, 2020

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Abstract

Abstract

To further explore the propagation law of gas coal dust explosion with different coal species involved, 3 kinds of representative coal dust were tested in a self-made semi-enclosed pipe, and the flame propagation speed, flame surface luminescence intensity and maximum explosion pressure of gas coal dust explosion were studied. The results show that the maximum explosion pressure and flame propagation velocity of gas coal dust explosion rise first and then decrease with the increase of coal dust concentration, and there is an optimal gas concentration and coal dust concentration, which makes the flame propagation speed reach the maximum and the luminous intensity reach the maximum; flame propagation speed, the maximum explosion pressure and the luminous intensity produced by the explosion are reduced by lignite, bituminous coal and anthracite in turn.
- gas coal dust explosion,
- maximum explosion pressure,
- flame propagation speed,
- different coal species,
- luminescent strength

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