Songling Jin , Wei Gao , Zichao Huang , Mingshu Bi , Haipeng Jiang , Rongjun Si , Guangcai Wen
{"title":"大型采矿巷道中主动抑爆系统对甲烷/煤尘爆炸的抑制特性","authors":"Songling Jin , Wei Gao , Zichao Huang , Mingshu Bi , Haipeng Jiang , Rongjun Si , Guangcai Wen","doi":"10.1016/j.firesaf.2024.104251","DOIUrl":null,"url":null,"abstract":"<div><p>To enhance intelligent prevention and control of methane/coal dust explosions in coal mines, the active explosion suppressor was developed. Methane/coal dust explosion suppression experiments were carried out in an 896-m mining tunnel. The suppression mechanism of NH<sub>4</sub>H<sub>2</sub>PO<sub>4</sub> powder during methane/coal dust explosions was elucidated. The results indicated that the device effectively prevented flame propagation within a 40 m radius by propelling NH<sub>4</sub>H<sub>2</sub>PO<sub>4</sub> powder using high-pressure nitrogen. There was a significant reduction in the intensity and destructiveness of the overpressure, with a maximum decrease of 61.43 %. The phosphorus-containing material produced by NH<sub>4</sub>H<sub>2</sub>PO<sub>4</sub> consumed free radicals through catalytic cycles of HOPO ⇔ PO<sub>2</sub> and HOPO ⇔ HPO<sub>3</sub>⇔PO(OH)<sub>2</sub>, weakening and interrupting the reactions, and suppressing flame development. NH<sub>4</sub>H<sub>2</sub>PO<sub>4</sub> reduced peak concentrations of CO and NO<sub>2</sub>. Guidelines for explosion suppression of CH<sub>4</sub>/coal dust explosions in large mining tunnel were presented. The findings provide technical and theoretical support for the prevention and control of methane/coal dust explosions in coal mines.</p></div>","PeriodicalId":50445,"journal":{"name":"Fire Safety Journal","volume":"150 ","pages":"Article 104251"},"PeriodicalIF":3.4000,"publicationDate":"2024-09-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Suppression characteristics of methane/coal dust explosions by active explosion suppression system in the large mining tunnel\",\"authors\":\"Songling Jin , Wei Gao , Zichao Huang , Mingshu Bi , Haipeng Jiang , Rongjun Si , Guangcai Wen\",\"doi\":\"10.1016/j.firesaf.2024.104251\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>To enhance intelligent prevention and control of methane/coal dust explosions in coal mines, the active explosion suppressor was developed. Methane/coal dust explosion suppression experiments were carried out in an 896-m mining tunnel. The suppression mechanism of NH<sub>4</sub>H<sub>2</sub>PO<sub>4</sub> powder during methane/coal dust explosions was elucidated. The results indicated that the device effectively prevented flame propagation within a 40 m radius by propelling NH<sub>4</sub>H<sub>2</sub>PO<sub>4</sub> powder using high-pressure nitrogen. There was a significant reduction in the intensity and destructiveness of the overpressure, with a maximum decrease of 61.43 %. The phosphorus-containing material produced by NH<sub>4</sub>H<sub>2</sub>PO<sub>4</sub> consumed free radicals through catalytic cycles of HOPO ⇔ PO<sub>2</sub> and HOPO ⇔ HPO<sub>3</sub>⇔PO(OH)<sub>2</sub>, weakening and interrupting the reactions, and suppressing flame development. NH<sub>4</sub>H<sub>2</sub>PO<sub>4</sub> reduced peak concentrations of CO and NO<sub>2</sub>. Guidelines for explosion suppression of CH<sub>4</sub>/coal dust explosions in large mining tunnel were presented. The findings provide technical and theoretical support for the prevention and control of methane/coal dust explosions in coal mines.</p></div>\",\"PeriodicalId\":50445,\"journal\":{\"name\":\"Fire Safety Journal\",\"volume\":\"150 \",\"pages\":\"Article 104251\"},\"PeriodicalIF\":3.4000,\"publicationDate\":\"2024-09-06\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Fire Safety Journal\",\"FirstCategoryId\":\"5\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S0379711224001644\",\"RegionNum\":3,\"RegionCategory\":\"工程技术\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"ENGINEERING, CIVIL\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Fire Safety Journal","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0379711224001644","RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"ENGINEERING, CIVIL","Score":null,"Total":0}
Suppression characteristics of methane/coal dust explosions by active explosion suppression system in the large mining tunnel
To enhance intelligent prevention and control of methane/coal dust explosions in coal mines, the active explosion suppressor was developed. Methane/coal dust explosion suppression experiments were carried out in an 896-m mining tunnel. The suppression mechanism of NH4H2PO4 powder during methane/coal dust explosions was elucidated. The results indicated that the device effectively prevented flame propagation within a 40 m radius by propelling NH4H2PO4 powder using high-pressure nitrogen. There was a significant reduction in the intensity and destructiveness of the overpressure, with a maximum decrease of 61.43 %. The phosphorus-containing material produced by NH4H2PO4 consumed free radicals through catalytic cycles of HOPO ⇔ PO2 and HOPO ⇔ HPO3⇔PO(OH)2, weakening and interrupting the reactions, and suppressing flame development. NH4H2PO4 reduced peak concentrations of CO and NO2. Guidelines for explosion suppression of CH4/coal dust explosions in large mining tunnel were presented. The findings provide technical and theoretical support for the prevention and control of methane/coal dust explosions in coal mines.
期刊介绍：
Fire Safety Journal is the leading publication dealing with all aspects of fire safety engineering. Its scope is purposefully wide, as it is deemed important to encourage papers from all sources within this multidisciplinary subject, thus providing a forum for its further development as a distinct engineering discipline. This is an essential step towards gaining a status equal to that enjoyed by the other engineering disciplines.
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