Advance Search
SHI Biming, NIU Yihui, ZHANG Leilin, ZHANG Yu, Zhong Zhen. Study on methane explosion overpressure evolution law and flame propagation characteristics in diagonal pipe networks[J]. COAL SCIENCE AND TECHNOLOGY, 2021, 49(1): 257-263. DOI: 10.13199/j.cnki.cst.2021.01.022
Citation: SHI Biming, NIU Yihui, ZHANG Leilin, ZHANG Yu, Zhong Zhen. Study on methane explosion overpressure evolution law and flame propagation characteristics in diagonal pipe networks[J]. COAL SCIENCE AND TECHNOLOGY, 2021, 49(1): 257-263. DOI: 10.13199/j.cnki.cst.2021.01.022

Study on methane explosion overpressure evolution law and flame propagation characteristics in diagonal pipe networks

More Information
  • Available Online: April 02, 2023
  • Published Date: January 24, 2021
  • In order to explore the overpressure evolution law and flame propagation characteristics after methane explosion in a complex underground network of coal mines, a methane explosion test system was built in the laboratory, the propagation law of the deflagration wave of a gas explosion with a methane volume fraction of 9.5% has been experimentally studied, and the overpressure and flame propagation process of the gas explosion have been numerically simulated. The test and numerical simulation results show that in the diagonal branch of the pipe network, the methane-air premixed gas explodes due to the superposition of the explosion pressure wave, forming an area of increased overpressure, but the flame wave generated is very weak and the temperature is low. In the parallel branch, with the increase of the propagation distance of the deflagration wave, the peak overpressure and the propagation velocity of the flame surface gradually decrease, while the flame duration first increases and then decreases. The maximum propagation distance of flame in the experiment is 18.75 m, while the propagation distance of the numerical simulation is 21.25 m,but the overall change law of experimental value and simulation value is the same. The research conclusions can provide theoretical support for the prevention, control and disasters in complex roadways in coal mines
  • Related Articles

    [1]LIU Peng, ZHAO Huihan, YANG Yanyan, JING Jiangbo, WEI Huizi, DING Enjie. Construction and reasoning of semantic ontology for gas explosion accident based on OWL[J]. COAL SCIENCE AND TECHNOLOGY, 2018, (8).
    [2]LI Runzhi, WANG Lei, YAO Sanqiao, SUN Lei, LI Juan, DONG Xinwen. Damage test of gas explosion to animals in the mine trial roadway[J]. COAL SCIENCE AND TECHNOLOGY, 2018, (7).
    [3]Li Yucheng Bi Qiuping Liu Tianqi, . Study on flame features of coal dust explosion under coordinated role of mixed coal qualities[J]. COAL SCIENCE AND TECHNOLOGY, 2017, (4).
    [4]Jia Baoshan Xiao Minghui Yin Bin Li Chunmiao Li Zongxiang Li Shouguo, . Symbolic associated gas of left coal oxidation in goaf affected to gas explosion[J]. COAL SCIENCE AND TECHNOLOGY, 2017, (4).
    [5]LIU Dan SI Rong-jun, . Experimental Study on Gas Explosion with Deposited Coal Dust Induced by lmpact Flow[J]. COAL SCIENCE AND TECHNOLOGY, 2014, (11).
    [6]LI Yuan TAN Ying-xin DING Xiao-yong QIN Jian, . Parameters of Diameter Varied Pipe Affected to Flame Propagation Velocity of Gas Explosion[J]. COAL SCIENCE AND TECHNOLOGY, 2013, (10).
    [7]Experiment Study on Obstacle Shape in Pipeline Affected to Gas Explosion[J]. COAL SCIENCE AND TECHNOLOGY, 2012, (2).
    [8]Study on Gas Explosion Mechanism in Low Gassy Mine[J]. COAL SCIENCE AND TECHNOLOGY, 2011, (5).
    [9]Ignition Energy Influenced to Travel Speed of Gas Explosion Flame[J]. COAL SCIENCE AND TECHNOLOGY, 2011, (3).
  • Cited by

    Periodical cited type(1)

    1. 郭晨,史康,秦勇,袁航,陈贞龙,高为,卢玲玲,李猴强,张旭阳,王祥,何红斌,张润涵. 基于排采数据的煤层气井排水—降压—产气有效性研究——以黔西织金区块为例. 煤炭科学技术. 2025(03): 370-384 . 本站查看

    Other cited types(0)

Catalog

    Article views (156) PDF downloads (328) Cited by(1)
    Related

    /

    DownLoad:  Full-Size Img  PowerPoint
    Return
    Return