Study of the Abnormal CO-Exceedance Phenomenon in the Tailgate Corner of a Low Metamorphic Coal Seam

Lei Li, Ting Ren, Xiaoxing Zhong and Jiantao Wang
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Lei Li: Key Laboratory of Gas and Fire Control for Coal Mines, Ministry of Education, China University of Mining & Technology, Xuzhou 221116, China
Ting Ren: Key Laboratory of Gas and Fire Control for Coal Mines, Ministry of Education, China University of Mining & Technology, Xuzhou 221116, China
Xiaoxing Zhong: Key Laboratory of Gas and Fire Control for Coal Mines, Ministry of Education, China University of Mining & Technology, Xuzhou 221116, China
Jiantao Wang: Key Laboratory of Gas and Fire Control for Coal Mines, Ministry of Education, China University of Mining & Technology, Xuzhou 221116, China

Energies, 2022, vol. 15, issue 15, 1-16

Abstract: Given the difficulty of early warning of coal spontaneous combustion caused by continuous abnormal exceedance of CO in the tailgate corner of a low metamorphic coal seam and taking the 1305-working face of the Dananhu No.1 coal mine in Hami, Xinjiang as an example, this paper studies the abnormal CO-exceedance phenomenon based on field measurements, experimental research, and numerical simulation. The research shows that the abnormal CO-exceedance phenomenon is not caused by spontaneous combustion oxidation but by ambient-temperature oxidation of coal in the goaf. Factors, such as higher amounts of residual coal and higher degrees of fragmentation of the goaf, provide opportunities for the ambient-temperature oxidation of residual coal in the 1305 goaf. The 1305 coal oxidation characteristics at ambient temperature are examined, and the abnormal CO-exceedance mechanism is analyzed in depth. A CO-early-warning-limit model in the tailgate corner for coal spontaneous combustion in the 1305 goaf is established, and the scientific problems needing to be solved by further research are also discussed. The relevant research results have an important guiding significance for improving scholars’ understandings of CO exceedance in similar low metamorphic coal seams and the early warning of coal spontaneous combustion.

Keywords: low metamorphic coal seam; ambient-temperature oxidation; abnormal CO exceedance; spontaneous combustion (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2022
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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