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Article

Study on Spontaneous Combustion Characteristics and Early Warning of Coal in a Deep Mine

by
Caiping Wang
1,2,
Yuxin Du
1,2,
Yin Deng
1,2,*,
Yu Zhang
1,
Jun Deng
1,2,
Xiaoyong Zhao
1 and
Xiadan Duan
1,2
1
School of Safety Science and Engineering, Xi’an University of Science & Technology, Xi’an 710054, China
2
Shaanxi Key Laboratory of Prevention and Control of Coal Fire, Xi’an 710054, China
*
Author to whom correspondence should be addressed.
Fire 2023, 6(10), 396; https://doi.org/10.3390/fire6100396
Submission received: 21 August 2023 / Revised: 3 October 2023 / Accepted: 12 October 2023 / Published: 14 October 2023
(This article belongs to the Special Issue Simulation, Experiment and Modeling of Coal Fires)
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Abstract

Due to high stress, high ground temperature, high moisture, and other factors in deep mines, the risk of coal spontaneous combustion (CSC) is enhanced, seriously affecting the safety of coal mining. To achieve early prediction of spontaneous combustion in the No. 3 coal seam at the Juye coalfield in the deep mine, this paper employs a temperature-programmed device to analyze the changing pattern of single-index gases and composite gas indices with temperature derived from the gas produced during csc. It also optimizes the index gas of coal sample spontaneous combustion. Simultaneously, the characteristics of coal temperature and a four-level warning indicator system for CSC are determined based on the analysis of indicator gas growth rate method, carbon-to-oxygen ratio, and the characteristics of the indicator gas. The composite index gases of the No. 3 coal seam in Juye coalfield are selected in the initial oxidation stage (Rco), accelerated oxidation stage (R1, G1), intense oxidation stage (R2, G1, G3), and oxidative decomposition stage (G3). This leads to the construction of a six-level warning system consisting of initial warning value, blue, yellow, orange, red, and black levels. Meanwhile, warning thresholds are also established.
Keywords: deep mining; coal spontaneous combustion; early warning indicator system; indicator gas deep mining; coal spontaneous combustion; early warning indicator system; indicator gas

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MDPI and ACS Style

Wang, C.; Du, Y.; Deng, Y.; Zhang, Y.; Deng, J.; Zhao, X.; Duan, X. Study on Spontaneous Combustion Characteristics and Early Warning of Coal in a Deep Mine. Fire 2023, 6, 396. https://doi.org/10.3390/fire6100396

AMA Style

Wang C, Du Y, Deng Y, Zhang Y, Deng J, Zhao X, Duan X. Study on Spontaneous Combustion Characteristics and Early Warning of Coal in a Deep Mine. Fire. 2023; 6(10):396. https://doi.org/10.3390/fire6100396

Chicago/Turabian Style

Wang, Caiping, Yuxin Du, Yin Deng, Yu Zhang, Jun Deng, Xiaoyong Zhao, and Xiadan Duan. 2023. "Study on Spontaneous Combustion Characteristics and Early Warning of Coal in a Deep Mine" Fire 6, no. 10: 396. https://doi.org/10.3390/fire6100396

APA Style

Wang, C., Du, Y., Deng, Y., Zhang, Y., Deng, J., Zhao, X., & Duan, X. (2023). Study on Spontaneous Combustion Characteristics and Early Warning of Coal in a Deep Mine. Fire, 6(10), 396. https://doi.org/10.3390/fire6100396

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