Distribution of H2S in the 10103 excavation working face of the Baozigou coal mine

Based on the production conditions of the 10103 excavation working face of the Baozigou coal mine, this paper analyzes the potential sources of H 2 S and the expected emission concentrations of H 2 S in the working face. Considering the previous engineering practice for controlling H 2 S disasters i...

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Bibliographic Details
Published in:Scientific reports 2024-03, Vol.14 (1), p.6197-6197, Article 6197
Main Authors: Jia, Niujun, Jia, Baoshan, Yan, Jingxue, Zhang, Jinyi
Format: Article
Language:English
Subjects:
639/166
704/172
Adsorption
Air flow
Biodegradation
CD4 antigen
Coal
Coal mine
Coal mines
Coal mining
Deterrence
Emissions
Entrainment
Excavation
Excavation working face
Gases
H2S concentration
Humanities and Social Sciences
Hydrogen
Hydrogen sulfide
Migration law
Mines
multidisciplinary
Numerical simulation
Science
Science (multidisciplinary)
Stress concentration
Sulfur content
Wind
Wind speed
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Summary:Based on the production conditions of the 10103 excavation working face of the Baozigou coal mine, this paper analyzes the potential sources of H 2 S and the expected emission concentrations of H 2 S in the working face. Considering the previous engineering practice for controlling H 2 S disasters in coal mine working faces, numerical simulations were conducted to investigate air flow and H 2 S migration and diffusion in the tunnel in the excavation working face. The migration and distribution of H 2 S in the coal seam mining face were studied, and the effects of outlet wind speed, duct location, and duct diameter on the H 2 S concentration distribution were explored. The higher the outlet wind speed, the more conducive to the emission of H 2 S gas, but too high a wind speed will be detrimental to the concentrated extraction and purification absorption of H 2 S; the closer the outlet position of the air duct is to the end of the working surface, the lower the H 2 S concentration in the vortex area at the corner; the air duct If the diameter is too small, the harmful gases released from hard-to-break coal cannot be entrained and taken away. When the diameter of the air duct is too large, the entrainment volume during the jet process will be expanded. To verify the field distribution of H 2 S concentration at the bottom, middle, and top of the boring machine, a CD4-type portable H 2 S instrument was used to analyze the distribution of H 2 S near the excavation working face.
ISSN:2045-2322
2045-2322
DOI:10.1038/s41598-024-56754-3