A rapid dual-drive technology for extinguishing large high-gas coal mines fires
Fires formed by the high gas protrusion in coal mines are difficult and risky to extinguish during the mine closure process due to the mine’s large closed range and underground gas stock. To achieve efficient and safe unsealing, reduce the risk of re-ignition and gas explosion, and accurately determ...
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| Format: | Article |
| Language: | English |
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Frontiers Media S.A.
2023-12-01
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| Series: | Frontiers in Earth Science |
| Subjects: | |
| Online Access: | https://www.frontiersin.org/articles/10.3389/feart.2023.1269092/full |
| _version_ | 1827397140689715200 |
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| author | Yong Mei |
| author_facet | Yong Mei |
| author_sort | Yong Mei |
| collection | DOAJ |
| description | Fires formed by the high gas protrusion in coal mines are difficult and risky to extinguish during the mine closure process due to the mine’s large closed range and underground gas stock. To achieve efficient and safe unsealing, reduce the risk of re-ignition and gas explosion, and accurately determine the fire extinguishing effect, a dual-drive rapid fire extinguishing technology is proposed. This technology involves ground precise positioning of drilling holes, rapid and large flow of liquid nitrogen injection, and curtain grouting to block fires in ultra-large high-gas mines. The practical results demonstrate that the implementation of surface injection of liquid nitrogen for fire extinguishing and cooling, and plugging effectively reduces the concentration of CO in the underground space from 230 PPm to 0 PPm, and decreases the CH4 concentration content from 90% to less than 0.75%. The fire extinguishing and cooling effect is fast and significant. A technical scheme for unsealing the fire area of the whole mine is formulated on a large scale based on the state of pumping and releasing pressure in the closed space of the mine. This scheme has important guiding significance for safety rescue and rescue operations after serious fire accidents occur in similar high-gas prominent mines. |
| first_indexed | 2024-03-08T19:02:57Z |
| format | Article |
| id | doaj.art-85fddd53b2e54536a3ffe1b7cac98071 |
| institution | Directory Open Access Journal |
| issn | 2296-6463 |
| language | English |
| last_indexed | 2024-03-08T19:02:57Z |
| publishDate | 2023-12-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Earth Science |
| spelling | doaj.art-85fddd53b2e54536a3ffe1b7cac980712023-12-28T04:13:49ZengFrontiers Media S.A.Frontiers in Earth Science2296-64632023-12-011110.3389/feart.2023.12690921269092A rapid dual-drive technology for extinguishing large high-gas coal mines firesYong MeiFires formed by the high gas protrusion in coal mines are difficult and risky to extinguish during the mine closure process due to the mine’s large closed range and underground gas stock. To achieve efficient and safe unsealing, reduce the risk of re-ignition and gas explosion, and accurately determine the fire extinguishing effect, a dual-drive rapid fire extinguishing technology is proposed. This technology involves ground precise positioning of drilling holes, rapid and large flow of liquid nitrogen injection, and curtain grouting to block fires in ultra-large high-gas mines. The practical results demonstrate that the implementation of surface injection of liquid nitrogen for fire extinguishing and cooling, and plugging effectively reduces the concentration of CO in the underground space from 230 PPm to 0 PPm, and decreases the CH4 concentration content from 90% to less than 0.75%. The fire extinguishing and cooling effect is fast and significant. A technical scheme for unsealing the fire area of the whole mine is formulated on a large scale based on the state of pumping and releasing pressure in the closed space of the mine. This scheme has important guiding significance for safety rescue and rescue operations after serious fire accidents occur in similar high-gas prominent mines.https://www.frontiersin.org/articles/10.3389/feart.2023.1269092/fullhigh gas outburst coal minessuper large firedual-driveunsealing the whole minegrouting sealing |
| spellingShingle | Yong Mei A rapid dual-drive technology for extinguishing large high-gas coal mines fires Frontiers in Earth Science high gas outburst coal mines super large fire dual-drive unsealing the whole mine grouting sealing |
| title | A rapid dual-drive technology for extinguishing large high-gas coal mines fires |
| title_full | A rapid dual-drive technology for extinguishing large high-gas coal mines fires |
| title_fullStr | A rapid dual-drive technology for extinguishing large high-gas coal mines fires |
| title_full_unstemmed | A rapid dual-drive technology for extinguishing large high-gas coal mines fires |
| title_short | A rapid dual-drive technology for extinguishing large high-gas coal mines fires |
| title_sort | rapid dual drive technology for extinguishing large high gas coal mines fires |
| topic | high gas outburst coal mines super large fire dual-drive unsealing the whole mine grouting sealing |
| url | https://www.frontiersin.org/articles/10.3389/feart.2023.1269092/full |
| work_keys_str_mv | AT yongmei arapiddualdrivetechnologyforextinguishinglargehighgascoalminesfires AT yongmei rapiddualdrivetechnologyforextinguishinglargehighgascoalminesfires |