Research on change law of fire smoke characteristics during dynamic sealing process of mine tunnels
In order to study the change law of smoke characteristics in the dynamic sealing process of coal mine roadway fire, FDS software was used to conduct full-scale numerical simulation of mine roadway fire, and the CO volume fraction decay rate model of roadway fire was established by scale experiment....
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| Format: | Article |
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Editorial Office of Safety in Coal Mines
2025-01-01
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| Series: | Meikuang Anquan |
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| Online Access: | https://www.mkaqzz.com/cn/article/doi/10.13347/j.cnki.mkaq.20240006 |
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| author | Chengmao HE Yang WANG Qingfeng ZHANG |
| author_facet | Chengmao HE Yang WANG Qingfeng ZHANG |
| author_sort | Chengmao HE |
| collection | DOAJ |
| description | In order to study the change law of smoke characteristics in the dynamic sealing process of coal mine roadway fire, FDS software was used to conduct full-scale numerical simulation of mine roadway fire, and the CO volume fraction decay rate model of roadway fire was established by scale experiment. The transverse and longitudinal temperature distribution and smoke spread law in the sealing process of 50% to 100% of the roadway were established, and the CO volume fraction attenuation model was established to predict the fire extinguishing time after the roadway was completely sealed. The results show that during the change of sealing ratio from 50% to 100%, the temperature at the center of the ceiling first sharply decreases and then slowly increases; after being sealed, the temperature above the fire source shows a distribution pattern of high temperature above and low temperature below, and the closer it is to the fire source, the faster the temperature decay rate; the vertical distribution of ceiling temperature shows an overall increase, the maximum temperature point shifts 1-3 m to the sealed side; the deposition phenomenon of smoke on the sealed side is obvious, and the stratification phenomenon disappears; the relationship between CO volume fraction and time is linear when one side is completely sealed. According to the CO volume fraction decay rate model, it is predicted that the ignition source of 2, 3 and 4 MW is extinguished after 103.16, 94.40 and 86.21 s, respectively. |
| format | Article |
| id | doaj-art-8f2fdee078a64947a6f8ee894ae596de |
| institution | Kabale University |
| issn | 1003-496X |
| language | zho |
| publishDate | 2025-01-01 |
| publisher | Editorial Office of Safety in Coal Mines |
| record_format | Article |
| series | Meikuang Anquan |
| spelling | doaj-art-8f2fdee078a64947a6f8ee894ae596de2025-01-15T04:32:08ZzhoEditorial Office of Safety in Coal MinesMeikuang Anquan1003-496X2025-01-0156110010610.13347/j.cnki.mkaq.20240006cMKAQ20240006Research on change law of fire smoke characteristics during dynamic sealing process of mine tunnelsChengmao HE0Yang WANG1Qingfeng ZHANG2State Key Laboratory of Coal Mine Disaster Prevention and Control, Chongqing 400037, ChinaWISDRI Engineering and Research Incorporation Limited, Wuhan 430000, ChinaBuertai Coal Mine, CHN Energy Shendong Coal Group Co., Ltd., Ordos 017000, ChinaIn order to study the change law of smoke characteristics in the dynamic sealing process of coal mine roadway fire, FDS software was used to conduct full-scale numerical simulation of mine roadway fire, and the CO volume fraction decay rate model of roadway fire was established by scale experiment. The transverse and longitudinal temperature distribution and smoke spread law in the sealing process of 50% to 100% of the roadway were established, and the CO volume fraction attenuation model was established to predict the fire extinguishing time after the roadway was completely sealed. The results show that during the change of sealing ratio from 50% to 100%, the temperature at the center of the ceiling first sharply decreases and then slowly increases; after being sealed, the temperature above the fire source shows a distribution pattern of high temperature above and low temperature below, and the closer it is to the fire source, the faster the temperature decay rate; the vertical distribution of ceiling temperature shows an overall increase, the maximum temperature point shifts 1-3 m to the sealed side; the deposition phenomenon of smoke on the sealed side is obvious, and the stratification phenomenon disappears; the relationship between CO volume fraction and time is linear when one side is completely sealed. According to the CO volume fraction decay rate model, it is predicted that the ignition source of 2, 3 and 4 MW is extinguished after 103.16, 94.40 and 86.21 s, respectively.https://www.mkaqzz.com/cn/article/doi/10.13347/j.cnki.mkaq.20240006roadway firedynamic sealing processtemperature distributionrapid sealingflue gas |
| spellingShingle | Chengmao HE Yang WANG Qingfeng ZHANG Research on change law of fire smoke characteristics during dynamic sealing process of mine tunnels Meikuang Anquan roadway fire dynamic sealing process temperature distribution rapid sealing flue gas |
| title | Research on change law of fire smoke characteristics during dynamic sealing process of mine tunnels |
| title_full | Research on change law of fire smoke characteristics during dynamic sealing process of mine tunnels |
| title_fullStr | Research on change law of fire smoke characteristics during dynamic sealing process of mine tunnels |
| title_full_unstemmed | Research on change law of fire smoke characteristics during dynamic sealing process of mine tunnels |
| title_short | Research on change law of fire smoke characteristics during dynamic sealing process of mine tunnels |
| title_sort | research on change law of fire smoke characteristics during dynamic sealing process of mine tunnels |
| topic | roadway fire dynamic sealing process temperature distribution rapid sealing flue gas |
| url | https://www.mkaqzz.com/cn/article/doi/10.13347/j.cnki.mkaq.20240006 |
| work_keys_str_mv | AT chengmaohe researchonchangelawoffiresmokecharacteristicsduringdynamicsealingprocessofminetunnels AT yangwang researchonchangelawoffiresmokecharacteristicsduringdynamicsealingprocessofminetunnels AT qingfengzhang researchonchangelawoffiresmokecharacteristicsduringdynamicsealingprocessofminetunnels |