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The Characteristics of Methane Combustion Suppression by Water Mist and Its Engineering Applications

Author

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  • Rongkun Pan

    (Department of Safety & Science Engineering, Henan Polytechnic University, Jiaozuo 454003, China
    The Collaborative Innovation Center of Coal Safety Production of Henan Province, Henan Polytechnic University, Jiaozuo 454003, China
    Henan Key Laboratory of Prevention and Cure of Mine Methane & Fires, Jiaozuo 45403, China)

  • Zejun Xiao

    (Department of Safety & Science Engineering, Henan Polytechnic University, Jiaozuo 454003, China)

  • Minggao Yu

    (Department of Safety & Science Engineering, Henan Polytechnic University, Jiaozuo 454003, China
    State Key Laboratory of Coal Mine Disaster Dynamics and Control, Chongqing University, Chongqing 400044, China)

Abstract

To safely mine coal, engineers must prevent gas combustion and explosions, as well as seek feasible and reasonable techniques to control for these types of incidents. This paper analyzes the causes and characteristics of methane combustion and explosions. Water mist is proposed to prevent and control methane combustion in an underground confined space. We constructed an experiment platform to investigate the suppression of methane combustion using water mist for different conditions. The experimental results showed that water mist is highly effective for methane flame inhibition. The flame was extinguished with water mist endothermic cooling. However, the annular regions of water vapor around the fire played a vital role in flame extinction. Water from the evaporating mist replaces the oxygen available to the fuel. Additionally, the time required for fuel ignition is prolonged. For these reasons, the water particle action to flame surface is reinforced and the fuel’s reaction with air is delayed. As a result, flame stretching and disturbances occur, which serve to extinguish the flame. Engineering application tests were carried out in the goaf, drill hole and upper-corner to investigate the prevention and control of methane gas combustion, with the results showing a good application effect.

Suggested Citation

  • Rongkun Pan & Zejun Xiao & Minggao Yu, 2017. "The Characteristics of Methane Combustion Suppression by Water Mist and Its Engineering Applications," Energies, MDPI, vol. 10(10), pages 1-14, October.
    • Handle: RePEc:gam:jeners:v:10:y:2017:i:10:p:1566-:d:114597
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    References listed on IDEAS

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    1. Rongkun Pan & Yuanping Cheng & Liang Yuan & Minggao Yu & Jun Dong, 2014. "Effect of bedding structural diversity of coal on permeability evolution and gas disasters control with coal mining," Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, Springer;International Society for the Prevention and Mitigation of Natural Hazards, vol. 73(2), pages 531-546, September.
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    Cited by:

    1. Chaoyu Hao & Yanling Chen & Jiren Wang & Cunbao Deng & Guang Xu & Fengwei Dai & Rui Si & Hongfei Wang & Haoyu Wang, 2018. "Study on the Effect of Iron-Based Deoxidizing Inhibitors for Coal Spontaneous Combustion Prevention," Energies, MDPI, vol. 11(4), pages 1-10, March.
    2. Yimin Zhang & Yan Wang & Ligang Zheng & Tao Yang & Jianliang Gao & Zhenhua Li, 2018. "Effect of Pristine Palygorskite Powders on Explosion Characteristics of Methane-Air Premixed Gas," Energies, MDPI, vol. 11(10), pages 1-12, September.
    3. Quan Wang & Shanghao Liu & Chi-min Shu & Yibin Ding & Zhimin Li, 2017. "Influence of Different Types of Obstacles on the Propagation of Premixed Methane-Air Flames in a Half-Open Tube," Energies, MDPI, vol. 10(11), pages 1-13, November.

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