中国安全科学学报 ›› 2019, Vol. 29 ›› Issue (7): 58-63.doi: 10.16265/j.cnki.issn1003-3033.2019.07.010

• 安全工程技术科学 • 上一篇    下一篇

拐弯角度对瓦斯爆炸诱导煤尘爆炸的影响研究

杨前意, 石必明 教授, 张雷林 副教授, 王超, 张鸿智   

  1. 安徽理工大学 能源与安全学院,安徽 淮南 232001
  • 收稿日期:2019-03-11 修回日期:2019-05-22 出版日期:2019-07-28 发布日期:2020-10-21
  • 作者简介:杨前意 (1994—),男,安徽铜陵人,硕士研究生,主要研究方向为煤与瓦斯灾害防治。E-mail:1976224370@qq.com。
  • 基金资助:
    国家自然科学基金资助(5184008);国家重点研发计划(2018YFC0808101);安徽省自然科学基金资助(1608085QE114)。

Study on influence of pipelines' bending angle on coal dust explosion induced by gas explosion

YANG Qianyi, SHI Biming, ZHANG Leilin, WANG Chao, ZHANG Hongzhi   

  1. School of Energy and Safety, Anhui University of Science and Technology, Huainan Anhui 232001, China
  • Received:2019-03-11 Revised:2019-05-22 Online:2019-07-28 Published:2020-10-21

摘要: 为研究瓦斯爆炸诱导煤尘爆炸在不同拐弯巷道内的传播特征,首先采用不同角度拐弯管道模拟煤矿井下拐弯巷道结构;然后利用煤尘爆炸试验系统,通过试验监测管道内不同位置的冲击波压力值和火焰传播速度值;最后研究不同拐弯角度管道内瓦斯爆炸诱导煤尘爆炸冲击波和火焰在拐弯前后的变化特征。结果表明:瓦斯填充长度一定的情况下,沉积煤尘爆炸冲击波峰值超压先减小后增大,到达管道拐弯后,急剧减小;冲击波峰值超压衰减率随着管道拐弯角度的增大而增大,角度越大,峰值超压衰减越快;火焰传播速度先增大后减小,经过拐弯管道后,速度突然增加;火焰传播速度变化率随拐弯角度的增大而增大,角度越大,速度增幅越大。

关键词: 瓦斯爆炸, 煤尘爆炸, 管道角度, 峰值超压, 火焰传播

Abstract: This paper is conducted to study the propagation law of coal dust explosion induced by gas explosion in different curved roadways. Firstly, pipelines with different bending angles were used to simulate the underground curved roadway structure. Then the coal dust explosion experimental system was used to test the shock wave pressure value and flame propagation velocity at different locations. Finally, study was carried out on the variation law of coal dust explosion shock waves in pipelines with different turning angles and that of the flame before and after the turning. The results show that with a certain gas filling length, the shock wave's peak overpressure of deposited coal dust explosion decreases at first and then increases, and it decreases sharply after reaching the corner. Its attenuation rate is augmented as the turning angle of pipelines increases, and the larger the angle is, the faster the attenuation of peak overpressure is, it is also found that the flame spreading velocity first increases and then decreases, and it increases abruptly after going through the curved pipe. Its change rate increases with the increase of the angle, and the larger the angle is, the greater the velocity increases.

Key words: gas explosion, coal dust explosion, pipe angle, peak overpressure, flame propagation

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