LAPSE:2023.31292
Published Article
LAPSE:2023.31292
Influence of Molasses on the Explosion and Decomposition Properties of the Coal Dust Deposited in Underground Mines
April 18, 2023
Abstract
Coal dust endangers the health and safety of workers in underground coal mines. Therefore, developing coal dust suppressants with dust prevention and explosion-proof properties is critical. The influence of molasses on the explosion and decomposition of the coal dust deposited in underground mines was investigated using 20 L explosion experiments and thermogravimetric and differential thermal analysis (TG-DTA). Findings reveal that, first, molasses can weakly promote the explosion of coal dust at low coal dust concentrations (<400 g/m3) but has no significant effect on the explosion at high coal dust concentrations (≥400 g/m3). Second, the decomposition process of the coal dust mixed with molasses has three stages: the moisture evaporation stage (0−150 °C), the molasses decomposition stage (150−300 °C), and the coal dust decomposition stage (300−500 °C). Molasses oxidation consumes oxygen and releases heat; at low coal dust concentrations, the released heat can promote coal dust decomposition to produce combustible gas, enhancing the coal dust explosion; at high coal dust concentrations, under the co-influence of the heat generation and oxygen consumption, molasses has no effect on the coal dust explosion. This is the mechanism of which molasses influences coal dust explosions.
Coal dust endangers the health and safety of workers in underground coal mines. Therefore, developing coal dust suppressants with dust prevention and explosion-proof properties is critical. The influence of molasses on the explosion and decomposition of the coal dust deposited in underground mines was investigated using 20 L explosion experiments and thermogravimetric and differential thermal analysis (TG-DTA). Findings reveal that, first, molasses can weakly promote the explosion of coal dust at low coal dust concentrations (<400 g/m3) but has no significant effect on the explosion at high coal dust concentrations (≥400 g/m3). Second, the decomposition process of the coal dust mixed with molasses has three stages: the moisture evaporation stage (0−150 °C), the molasses decomposition stage (150−300 °C), and the coal dust decomposition stage (300−500 °C). Molasses oxidation consumes oxygen and releases heat; at low coal dust concentrations, the released heat can promote coal dust decomposition to produce combustible gas, enhancing the coal dust explosion; at high coal dust concentrations, under the co-influence of the heat generation and oxygen consumption, molasses has no effect on the coal dust explosion. This is the mechanism of which molasses influences coal dust explosions.
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Keywords
coal dust, coal dust explosion, molasses, suppression performance, TG-DTA
Subject
Suggested Citation
Liu J, Lin M, Jin L, Li G, Ou S, Wang Y, Wang T, Jueraiti M, Tian Y, Wang J. Influence of Molasses on the Explosion and Decomposition Properties of the Coal Dust Deposited in Underground Mines. (2023). LAPSE:2023.31292
Author Affiliations
Liu J: NHC Key Laboratory for Engineering Control of Dust Hazard, University of Science and Technology Beijing, Beijing 100083, China; Research Institute of Macro-Safety Science, University of Science and Technology Beijing, Beijing 100083, China; State Key Labo [ORCID]
Lin M: School of Civil and Resource Engineering, University of Science and Technology Beijing, Beijing 100083, China
Jin L: NHC Key Laboratory for Engineering Control of Dust Hazard, University of Science and Technology Beijing, Beijing 100083, China; Research Institute of Macro-Safety Science, University of Science and Technology Beijing, Beijing 100083, China
Li G: State Key Laboratory of Safety and Health for Metal Mine, Maanshan 243000, China
Ou S: School of Civil and Resource Engineering, University of Science and Technology Beijing, Beijing 100083, China
Wang Y: College of Environment and Safety Engineering, Qingdao University of Science and Technology, Qingdao 266042, China
Wang T: School of Civil and Resource Engineering, University of Science and Technology Beijing, Beijing 100083, China
Jueraiti M: School of Civil and Resource Engineering, University of Science and Technology Beijing, Beijing 100083, China
Tian Y: School of Civil and Resource Engineering, University of Science and Technology Beijing, Beijing 100083, China
Wang J: School of Civil and Resource Engineering, University of Science and Technology Beijing, Beijing 100083, China
Lin M: School of Civil and Resource Engineering, University of Science and Technology Beijing, Beijing 100083, China
Jin L: NHC Key Laboratory for Engineering Control of Dust Hazard, University of Science and Technology Beijing, Beijing 100083, China; Research Institute of Macro-Safety Science, University of Science and Technology Beijing, Beijing 100083, China
Li G: State Key Laboratory of Safety and Health for Metal Mine, Maanshan 243000, China
Ou S: School of Civil and Resource Engineering, University of Science and Technology Beijing, Beijing 100083, China
Wang Y: College of Environment and Safety Engineering, Qingdao University of Science and Technology, Qingdao 266042, China
Wang T: School of Civil and Resource Engineering, University of Science and Technology Beijing, Beijing 100083, China
Jueraiti M: School of Civil and Resource Engineering, University of Science and Technology Beijing, Beijing 100083, China
Tian Y: School of Civil and Resource Engineering, University of Science and Technology Beijing, Beijing 100083, China
Wang J: School of Civil and Resource Engineering, University of Science and Technology Beijing, Beijing 100083, China
Journal Name
Energies
Volume
16
Issue
6
First Page
2758
Year
2023
Publication Date
2023-03-16
ISSN
1996-1073
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Original Submission
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PII: en16062758, Publication Type: Journal Article
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LAPSE:2023.31292
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https://doi.org/10.3390/en16062758
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