Study on Spontaneous Combustion Characteristics and Early Warning of Coal in a Deep Mine
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...
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-10-01
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| Series: | Fire |
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| Online Access: | https://www.mdpi.com/2571-6255/6/10/396 |
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| author | Caiping Wang Yuxin Du Yin Deng Yu Zhang Jun Deng Xiaoyong Zhao Xiadan Duan |
| author_facet | Caiping Wang Yuxin Du Yin Deng Yu Zhang Jun Deng Xiaoyong Zhao Xiadan Duan |
| author_sort | Caiping Wang |
| collection | DOAJ |
| description | 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 (<i>Rco</i>), accelerated oxidation stage (<i>R</i><sub>1</sub>, <i>G</i><sub>1</sub>), intense oxidation stage (<i>R</i><sub>2</sub>, <i>G</i><sub>1</sub>, <i>G</i><sub>3</sub>), and oxidative decomposition stage (<i>G</i><sub>3</sub>). 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. |
| first_indexed | 2024-03-10T21:16:03Z |
| format | Article |
| id | doaj.art-cf6d7dca23b74b718aca2b2cf4288d40 |
| institution | Directory Open Access Journal |
| issn | 2571-6255 |
| language | English |
| last_indexed | 2024-03-10T21:16:03Z |
| publishDate | 2023-10-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Fire |
| spelling | doaj.art-cf6d7dca23b74b718aca2b2cf4288d402023-11-19T16:27:17ZengMDPI AGFire2571-62552023-10-0161039610.3390/fire6100396Study on Spontaneous Combustion Characteristics and Early Warning of Coal in a Deep MineCaiping Wang0Yuxin Du1Yin Deng2Yu Zhang3Jun Deng4Xiaoyong Zhao5Xiadan Duan6School of Safety Science and Engineering, Xi’an University of Science & Technology, Xi’an 710054, ChinaSchool of Safety Science and Engineering, Xi’an University of Science & Technology, Xi’an 710054, ChinaSchool of Safety Science and Engineering, Xi’an University of Science & Technology, Xi’an 710054, ChinaSchool of Safety Science and Engineering, Xi’an University of Science & Technology, Xi’an 710054, ChinaSchool of Safety Science and Engineering, Xi’an University of Science & Technology, Xi’an 710054, ChinaSchool of Safety Science and Engineering, Xi’an University of Science & Technology, Xi’an 710054, ChinaSchool of Safety Science and Engineering, Xi’an University of Science & Technology, Xi’an 710054, ChinaDue 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 (<i>Rco</i>), accelerated oxidation stage (<i>R</i><sub>1</sub>, <i>G</i><sub>1</sub>), intense oxidation stage (<i>R</i><sub>2</sub>, <i>G</i><sub>1</sub>, <i>G</i><sub>3</sub>), and oxidative decomposition stage (<i>G</i><sub>3</sub>). 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.https://www.mdpi.com/2571-6255/6/10/396deep miningcoal spontaneous combustionearly warning indicator systemindicator gas |
| spellingShingle | Caiping Wang Yuxin Du Yin Deng Yu Zhang Jun Deng Xiaoyong Zhao Xiadan Duan Study on Spontaneous Combustion Characteristics and Early Warning of Coal in a Deep Mine Fire deep mining coal spontaneous combustion early warning indicator system indicator gas |
| title | Study on Spontaneous Combustion Characteristics and Early Warning of Coal in a Deep Mine |
| title_full | Study on Spontaneous Combustion Characteristics and Early Warning of Coal in a Deep Mine |
| title_fullStr | Study on Spontaneous Combustion Characteristics and Early Warning of Coal in a Deep Mine |
| title_full_unstemmed | Study on Spontaneous Combustion Characteristics and Early Warning of Coal in a Deep Mine |
| title_short | Study on Spontaneous Combustion Characteristics and Early Warning of Coal in a Deep Mine |
| title_sort | study on spontaneous combustion characteristics and early warning of coal in a deep mine |
| topic | deep mining coal spontaneous combustion early warning indicator system indicator gas |
| url | https://www.mdpi.com/2571-6255/6/10/396 |
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