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Experimental and Simulation Study on the Explosion of a Coal/Methane Mixed System.
Changhu Li1, Pengjiang Deng2, Youwei Guo1
1Linxian Jinyuan Coal Mine Co. Ltd., Lvliang, Shanxi 033200, China.
ACS Omega
|June 23, 2025
Summary
Four powder explosion suppressants were tested for coal dust/methane explosions. All reduced explosion pressure and rate, with MPP being most effective, inhibiting explosions via physical and chemical mechanisms involving free radicals.
Area of Science:
- Chemical Engineering
- Combustion Science
- Mining Safety Engineering
Background:
- Coal dust and methane mixtures pose significant explosion risks in mining.
- Effective explosion suppressants are crucial for enhancing mine safety.
Purpose of the Study:
- To investigate the microscale suppression mechanisms of four powder explosion suppressants.
- To explore the roles of gas-phase reactions and free radicals in coal dust/methane explosions.
- To provide a theoretical basis for optimizing explosion suppressants.
Main Methods:
- Experimental testing of four powder explosion suppressants.
- Numerical simulations of explosion dynamics.
- Analysis of gas-phase reaction pathways and free radical interactions.
Main Results:
- All tested suppressants effectively reduced maximum explosion pressure and pressure rise rate.
- MPP demonstrated the highest efficacy, reducing pressure by 38%.
- Suppression mechanisms include physical heat absorption and chemical free-radical scavenging.
Conclusions:
- Powder explosion suppressants inhibit coal dust/methane explosions through dual physical and chemical pathways.
- Phosphorus-containing suppressants and bicarbonate/carbonate compounds exhibit distinct free-radical scavenging mechanisms.
- Findings support the development of advanced explosion suppression strategies for mining environments.
