| CO2-超细水雾对瓦斯/煤尘爆炸抑制特性研究 |
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| 引用本文： | 裴蓓,李杰,余明高,韦双明,杨双杰,温小萍.CO2-超细水雾对瓦斯/煤尘爆炸抑制特性研究[J].中国安全生产科学技术,2018,14(8):54-60. |
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| 作者姓名： | 裴蓓 李杰 余明高 韦双明 杨双杰 温小萍 |
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| 作者单位： | （1.河南理工大学 煤炭安全生产河南省协同创新中心，河南 焦作 454003；2.重庆大学 煤矿灾害动力学与控制国家重点实验室，重庆 400044） |
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| 摘 要： | 为了解CO2-超细水雾对瓦斯/煤尘爆炸抑制特性，用自行搭建的实验系统，从超压、火焰传播速度和火焰结构3个方面研究了CO2-超细水雾形成的气液两相介质对9.5%瓦斯/煤尘复合体系爆炸的抑爆效果、影响因素与原因。研究结果表明:随着CO2体积分数和超细水雾质量浓度的增加，爆炸火焰最大传播速度、爆炸超压峰值均出现明显下降，火焰到达泄爆口时间显著延迟；尤其当CO2体积分数达到14%与超细水雾的共同抑爆效果凸显，瓦斯/煤尘复合体系爆炸超压的“震荡平台”消失，同时火焰结构呈现“整体孔隙化”。所得结论为煤矿井下高效防爆抑爆技术进行了完善和增强。
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| 关 键 词： | 瓦斯/煤尘复合体系 爆炸抑制 气液两相抑爆 二氧化碳 超细水雾 |
Study on suppression characteristics of gas/coal dust explosion by CO2 and ultra-fine water mist |
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| PEI Bei,LI Jie,YU Minggao,WEI Shuangming,YANG Shuangjie,WEN Xiaoping.Study on suppression characteristics of gas/coal dust explosion by CO2 and ultra-fine water mist[J].Journal of Safety Science and Technology,2018,14(8):54-60. |
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| Authors: | PEI Bei LI Jie YU Minggao WEI Shuangming YANG Shuangjie WEN Xiaoping |
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| Affiliation: | (1. Coal Production Safety Collaborative Innovation Center in Henan Province, Henan Polytechnic University, Jiaozuo Henan 454003, China;2. State Key Laboratory of Coal Mine Disaster Dynamics and Control, Chongqing University, Chongqing 400044, China) |
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| Abstract: | To understand the suppression characteristics of gas/coal dust explosion by CO2 and ultra-fine water mist, the effect, influencing factors and reasons of explosion suppression for 9.5% gas/coal dust composite system explosion by the gas-liquid two-phase medium of CO2 and ultra-fine water mist were studied from three aspects including the overpressure, flame propagation velocity and flame structure by using the self-built experimental system. The results showed that with the increase of the volume fraction of CO2 and the mass concentration of ultra-fine water mist, both the maximum flame propagation velocity and the peak explosion overpressure decreased significantly, and the time of the flame arriving at the explosion vent delayed obviously. Especially when the volume fraction of CO2 reached 14%, the synergistic explosion suppression effect of CO2 and ultra-fine water mist was significant, the “shock platform” of overpressure of the gas/coal dust composite system explosion disappeared, meanwhile, the flame structure showed the characteristic of “overall porous”. The results improve and strengthen the underground effective explosion prevention and suppression technologies in coal mine. |
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| Keywords: | gas/coal dust composite system explosion suppression gas-liquid two-phase explosion suppression CO2 ultra-fine water mist |
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