Influence of Cavity Width and Powder Filling in a Cavity on Overpressure Evolution Laws and Flame Propagation Characteristics of Methane/Air Explosion

Zhou, Huisheng; Mu, Chaomin

doi:10.1021/acsomega.1c00054

Cited by 6 publications

(4 citation statements)

References 41 publications

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“…Based on the above background, Fu [21] aimed to investigate the safety of nanomaterial powder control technology in mine gas explosion suppression. Zhou [22] provided theoretical guidance for the suppression of gas explosions in a study designed to facilitate the suppression of gas explosion accidents. Wang et al [23] used a customized diagonal pipe network experimental system to evaluate the suppression of methane explosions using a ne water mist containing KCl and inert gas.…”

Section: Introductionmentioning

confidence: 99%

Numerical Study of High Temperature Heat Pipe to Suppress Gas Explosion

Gui

Wang

Zhu

et al. 2023

Preprint

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As a new type of heat transfer element, high temperature heat pipe has high heat transfer efficiency and broad prospects in suppressing gas explosion shock wave and flame. In this paper, the mechanism and effect of gas explosion suppression in high temperature heat pipe were analyzed by theoretical analysis and numerical simulation. ANAYS FLUENT was used to simulate the propagation process of gas explosion, and the simulation results were in good agreement with the experimental results. The influence of high temperature heat pipe on gas explosion propagation characteristics under different working conditions was studied. The results show that the flame propagation speed of gas explosion in the roadway with high temperature heat pipe is reduced, which will have nearly twice the time delay, the peak value of flame temperature is reduced, and the maximum overpressure of gas explosion in the roadway after the high temperature heat pipe is far lower than the maximum overpressure when the high temperature heat pipe is not laid. The layout of high temperature heat pipes in the roadway has different degrees of influence on the explosion suppression effect, and the best explosion suppression effect is achieved when the high temperature heat pipes are placed at 10 m intervals and inclined at 90°. The application of high temperature heat pipe technology to restrain gas explosion has certain feasibility, and the research results are of great significance to the safe and efficient production of coal mines.

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Section: Introductionmentioning

confidence: 99%

Numerical Study of High Temperature Heat Pipe to Suppress Gas Explosion

Gui

Wang

Zhu

et al. 2023

Preprint

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“…A gas explosion is one of the major disasters faced by coal mines. A gas explosion often causes explosion of coal powder deposited in coal mine roadways, , and a gas/coal two-phase explosion accident is more harmful. , …”

Section: Introductionmentioning

confidence: 99%

Experimental Study on Two-Phase Explosion Suppression of Gas/Pulverized Coal by Explosion Suppressant

Liu

2022

ACS Omega

Self Cite

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Pulverized coal is widely distributed in coal mine roadways, which can enhance the power of a gas explosion. Explosion suppression technology can effectively reduce the explosion power. At present, rock powder shed, a water bag, and ABC powder are widely used in most coal mine explosion suppression technologies. In order to verify the explosion suppression effect of rock powder, water, and ABC powder in the pulverized coal environment, a series of experiments on a suppressing gas/pulverized coal two-phase explosion were carried out with a self-built large-scale gas explosion experimental system. The experimental study in this paper can provide some reference for the improvement of explosion suppression technology in coal mines. In this paper, through the suppression of a secondary explosion, flame, and impact of pulverized coal, the explosion suppression effects of three kinds of explosion suppressants are comprehensively analyzed. The results show that rock powder has a good inhibitory effect on a secondary explosion and flame of pulverized coal, and water has a good inhibitory effect on the shock wave. ABC powder has the best explosion suppression effect; the inhibition of a secondary explosion of pulverized coal is 4.17 times that of rock powder, the inhibition of flame is 4.28 times that of rock powder, and the inhibition of shock wave is 2.24 times that of water.

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“…However, little research has been done on the impact of the cavity structure on gas explosions in an excavation roadway. Mu et al , proposed that the cavity had a significant effect on gas explosion suppression, but the cavity type was single. In addition, the explosion surface mechanism is not intensive and the engineering background of the research is not transparent, resulting in conclusions that are not universal.…”

Section: Introductionmentioning

confidence: 99%

Influence of the Cavity Structure in the Excavation Roadway on the Gas Explosion Characteristics

Gao

Liu

et al. 2022

ACS Omega

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Gas explosion accidents are one of the most severe coal mine disasters. Usually, they can cause considerable property losses and casualties, which seriously restrict the development of the coal mining industry. This study used Ansys/Fluent software to simulate gas explosions in excavation roadways with different cavity structures, and 11 models with different cavity structures were established. The study results show that the propagation law of gas explosion in an excavation roadway with different cavity structures was affected by the cavity shapes, the oval cavity of the long axis/short axis ratio (LA/SA), and the cavity numbers. The overpressure, impulse, and flame speed decreased when a cavity existed, compared to the values in a tube without a cavity. The values of overpressure, impulse, and flame speed were smallest in a rectangular cavity. Furthermore, with increasing the LA/SA, the strength of the gas explosion was reduced significantly. The more the cavities were, the better the intensity of gas explosions was controlled. The research results can provide theoretical support and an experimental basis for preventing and controlling gas explosion accidents.

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Influence of Cavity Width and Powder Filling in a Cavity on Overpressure Evolution Laws and Flame Propagation Characteristics of Methane/Air Explosion

Cited by 6 publications

References 41 publications

Numerical Study of High Temperature Heat Pipe to Suppress Gas Explosion

Numerical Study of High Temperature Heat Pipe to Suppress Gas Explosion

Experimental Study on Two-Phase Explosion Suppression of Gas/Pulverized Coal by Explosion Suppressant

Influence of the Cavity Structure in the Excavation Roadway on the Gas Explosion Characteristics

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