大气扰动下封闭火区瓦斯波动特性分析

doi:10.16265/j.cnki.issn1003-3033.2019.12.010

中国安全科学学报 ›› 2019, Vol. 29 ›› Issue (12): 59-65.doi: 10.16265/j.cnki.issn1003-3033.2019.12.010

大气扰动下封闭火区瓦斯波动特性分析

段玉龙¹ 副研究员, 王硕¹, 杨燕铃¹, 李元兵¹, 王文和¹ 教授, 蒋新生² 教授

1 重庆科技学院安全工程学院,重庆 401331;
2 陆军勤务学院油料系,重庆 401331

收稿日期:2019-10-10 修回日期:2019-11-10 出版日期:2019-12-28 发布日期:2020-11-24
作者简介:段玉龙 (1982—),男,重庆人,博士,副研究员,主要从事火灾、爆炸、通风等方面的研究。E-mail:dylnhz@126.com。
基金资助:
国家自然科学基金面上项目资助(51874063);重庆市科委自然科学基金面上项目资助(cstc2019jcyj-msxmX0324);重庆市教育委员会科学技术研究计划资助项目(KJQN201801517);重庆科技学院校内科研基金资助(ck2017zkyb001)。

Analysis of gas fluctuation characteristics in a closed fire zone under atmospheric disturbance

DUAN Yulong¹, WANG Shuo¹, YANG Yanling¹, LI Yuanbing¹, WANG Wenhe¹, JIANG Xinsheng²

1 College of Safety Engineering, Chongqing University of Science & Technology, Chongqing 401331, China;
2 Oil Department, Army Service College, Chongqing 401331, China

Received:2019-10-10 Revised:2019-11-10 Online:2019-12-28 Published:2020-11-24

摘要/Abstract

摘要： 为预防火区封闭导致的瓦斯爆炸事故,以大型地下矿井为研究对象,根据矿井内瓦斯涌出量和矿井结构特点,建立气压波动、封闭火区漏风量、封闭火区瓦斯体积分数预测模型;研究火区内侧瓦斯体积分数因大气扰动在压差、火区体积、风阻、瓦斯涌出量和封闭时刻等多因素耦合影响的变化特征。结果表明:封闭火区内外压差因大气波动呈现周期变化,火区体积和瓦斯涌出量决定火区瓦斯体积分数;风阻是火区抗大气波动干扰关键因素,增加火区风阻,可缩短瓦斯体积分数通过爆炸极限时间;降低封闭火区体积,可缩短瓦斯爆炸时间。

关键词: 封闭火区, 压差, 瓦斯体积分数, 大气波动

Abstract: In order to prevent gas explosion induced by closed fire zones, with large underground mines as research object, a gas pressure fluctuation model, an air leakage model and a gas concentration prediction model were established according to gas emission amount and structural characteristics of mines. Then, variation law of gas concentration in inner areas due to atmospheric disturbance was studied under coupling influence of pressure difference, fire zone volume, wind resistance, gas emission amount and sealing timing. The results show that pressure difference between inside and outside of closed fire zones will change periodically due to atmospheric fluctuation, and gas concentration is determined by zone volume and gas emission amount. Among all factors, wind resistance is a vital one that affects fire zone's ability to withstand disturbance of atmospheric fluctuation, and an increase of it will shorten time for gas concentration to pass explosion limit while an reduction of zone volume can shorten explosion period.

Key words: closed fire zone, pressure difference, gas concentration, atmospheric disturbance

中图分类号:

X936

段玉龙, 王硕, 杨燕铃, 李元兵, 王文和, 蒋新生. 大气扰动下封闭火区瓦斯波动特性分析[J]. 中国安全科学学报, 2019, 29(12): 59-65.

DUAN Yulong, WANG Shuo, YANG Yanling, LI Yuanbing, WANG Wenhe, JIANG Xinsheng. Analysis of gas fluctuation characteristics in a closed fire zone under atmospheric disturbance[J]. China Safety Science Journal, 2019, 29(12): 59-65.

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大气扰动下封闭火区瓦斯波动特性分析

Analysis of gas fluctuation characteristics in a closed fire zone under atmospheric disturbance

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