|本期目录/Table of Contents|

[1]贾静,郭立稳,朱令起,等.矿井巷道火灾烟流逆退数值模拟及临界风速研究[J].中国安全生产科学技术,2020,16(4):94-100.[doi:10.11731/j.issn.1673-193x.2020.04.015]
 JIA Jing,GUO Liwen,ZHU Lingqi,et al.Study on numerical simulation of smoke backflow and critical wind speed in mine roadway fire[J].JOURNAL OF SAFETY SCIENCE AND TECHNOLOGY,2020,16(4):94-100.[doi:10.11731/j.issn.1673-193x.2020.04.015]
点击复制

矿井巷道火灾烟流逆退数值模拟及临界风速研究
分享到:

《中国安全生产科学技术》[ISSN:1673-193X/CN:11-5335/TB]

卷:
16
期数:
2020年4期
页码:
94-100
栏目:
职业安全卫生管理与技术
出版日期:
2020-04-30

文章信息/Info

Title:
Study on numerical simulation of smoke backflow and critical wind speed in mine roadway fire
文章编号:
1673-193X(2020)-04-0094-07
作者:
贾静郭立稳朱令起张嘉勇
(华北理工大学,河北 唐山 063210)
Author(s):
JIA Jing GUO Liwen ZHU Lingqi ZHANG Jiayong
(North China University of Science and Technology,Tangshan Hebei 063210,China)
关键词:
矿井火灾烟流逆退数值模拟临界风速火风压
Keywords:
mine fire smoke backflow numerical simulation critical wind speed fire wind pressure
分类号:
X936
DOI:
10.11731/j.issn.1673-193x.2020.04.015
文献标志码:
A
摘要:
为了研究矿井发生火灾后高温烟流的蔓延规律及影响因素,利用COMSOL软件对火区进行数值模拟,建立巷道三维模型,得到火区风流速度与温度分布。通过改变边界条件,分析火风压作用下,火区烟气在不同控制风速、巷道条件作用下蔓延规律,得出不同因素与临界风速的关系,为选取合理的火灾控制风速提供理论依据。研究结果表明:火源温度一定时,巷道入口风速越低,火源下风侧高温烟流越靠近巷道顶部,随着风速增大,向巷道下部蔓延;风速较低时,在火区火风压的作用下,会产生烟流逆退现象,随着风速的增大,逆流层长度和厚度随之减小;巷道入口通风条件不变时,火区温度越高越容易产生烟流的逆退,影响范围越大;巷道高度越高、上行风坡度越小,越易发生逆退现象;不同影响因素与巷道平均温度不成正比关系,其中下行风坡度5~15°时巷道平均温度较高且易于发生烟流滚退现象,影响范围较大;火源温度、巷道条件与临界风速的数据拟合结果对预测巷道的临界风速有较好的参考价值。
Abstract:
In order to study the spread laws and influence factors of hightemperature smoke flow after the mine fire,the COMSOL software was used to conduct the numerical simulation.A threedimensional model of roadway was established,and the wind flow velocity and temperature distribution in the fire area were obtained.By changing the boundary conditions,the spread laws of smoke in the fire area under different control wind speeds and roadway conditions with the effect of fire wind pressure were analyzed,then the relationship between different factors and the critical wind speed was obtained,which provided theoretical basis for selecting the reasonable fire control wind speed.The results showed that when the fire source temperature was constant,the lower the wind speed at the entry of roadway,the closer the hightemperature smoke flow on the downwind side of fire source to the roadway top.As the wind speed increased,the smoke spread to the lower part of roadway.When the wind speed was low,the phenomenon of smoke backflow would occur under the effect of fire wind pressure in the fire area,and with the increase of wind speed,the length and thickness of countercurrent layer decreased accordingly.When the ventilation conditions at the roadway entrance remained unchanged,the higher the temperature in the fire area,the more likely the occurrence of smoke backflow,and the larger the influence range.The higher the roadway height and the greater the upward wind slope,the more likely the occurrence of smoke backflow.Different influencing factors were not in direct proportion to the average temperature of the roadway.When the downward wind slope was 5~15°,the average temperature of roadway was high and the smoke flow was prone to roll back,and the influence range was larger.The fitting results of fire source temperature,tunnel conditions and critical wind speed have good reference value for predicting the critical wind speed of roadway.

参考文献/References:

[1]王凯,蒋曙光,张卫清,等.矿井火灾救灾中风量远程调控技术及数值分析[J].煤炭学报,2012,37(7):1171-1176. WANG Kai,JIANG Shuguang,ZHANG Weiqing,et al.Remote control technology and numerical analysis of airflow in coal mine fire disaster relief process [J].Journal of China Coal Society,2012,37(7):1171-1176.
[2]王文才,王鑫宙,张根源,等.煤田露头火区温度场模拟分析和火风压计算[J].煤炭技术,2016,35(3):126-128. WANG Wencai,WANG Xinzhou,ZHANG Genyuan,et al.Temperature simulation of coal outcrop fire area and calculation of fire wind pressure [J].Coal Technology,2016,35(3):126-128.
[3]孙丽青.典型矿井巷道外因火灾烟气运移规律及主要影响因素研究[D].太原:太原理工大学,2018.
[4]张国枢,王省身.火风压的计算及其影响因素分析[J].中国矿业学院学报,1983(3):69-82. ZHAN Guoshu,WANG Xingsheng.Calculation and analysis of ventilating pressure due to mine fire [J].Journal of China Institute of Mining,1983(3):69-82.
[5]陈贵林,刘恒昆.对矿井火风压的认识及近似计算[J].煤炭技术,2002(6):28-30. CHEN Guilin,LIU Hengkun.Study and approximate calculation of the fire ventilation pressure in coal mine [J].Coal Technology,2002(6):28-30.
[6]王海燕,张敏敏,徐祚卉,等.单洞双线隧道火灾疏散时临界风速实验研究[J].消防科学与技术,2018,37(7):907-909. WANG Haiyan,ZHANG Minmin,XU Zuohui,et al.Experiment on critical wind speed for evacuation during single-holedouble-track tunnel fire [J].Fire Science and Technology,2018,37(7):907-909.
[7]曾艳华,胡百万,黎旭,等.大纵坡双向行车公路隧道火灾控制风速研究[J].地下空间与工程学报,2013,9(4):959-964. ZENG Yanhua,HU Baiwang,LI Xu,et al.Study on wind flow velocity under fire control in two-direction road tunnel with large longitudinal slope [J].Chinese Journal of Underground Space and Engineering,2013,9(4):959-964.
[8]周心权,王海燕,赵红泽.平巷烟流滚退逆行规律[J].北京科技大学学报,2004,26(2):118-121. ZHOU Xinquan,WANG Haiyan,ZHAO Hongze.Rollback law of reverse smoke flow in a horizontal airway during mine fire [J].Journal of University of Science and Technology Beijing,2004,26(2):118-121.
[9]郭晓杰,方春平.基于数值模拟的隧道火灾临界风速分析[J].四川建筑,2018,38(1):131-133. GUO Xiaojie,FANG Chunping.Critical wind speed analysis of tunnel fire based on numerical simulation [J].Sichuan Architecture,2018,38(1):131-133.
[10]王海燕,周心权.平巷烟流滚退火烟羽流模型及其特征参数研究[J].煤炭学报,2004,29(2):190-194. WANG Haiyan,ZHOU Xinquan.Fire buoyant plume model and characteristic parameters of a reverse smoke in a horizontal airway during mine fire [J].Journal of China Coal Society,2004,29(2):190-194.
[11]周福宝,王德明.巷(隧)道火灾烟流滚退距离的无因次关系式[J].中国矿业大学学报,2003,32(4):407-410. ZHONG Fubao,WANG Deming.Non-dimensional expression for backflow distances of smoke and hot gases in roadway or tunnel fire [J].Journal of China University of Mining & Technology,2003,32(4):407-410.
[12]周福宝,王德明.矿井火灾烟流滚退距离的数值模拟[J].中国矿业大学学报,2004,33(5):499-503. ZHOU Fubao,WANG Deming.Numerical analysis of backflow distance of smoke in mine fire [J].Journal of China University of Mining & Technology,2004,33(5):499-503.
[13]柴建平.金属矿山灾变风流自动控制系统的探讨[J].煤炭科技,2019,40(3):17-19. CHAI Jianping.Discussion on automatic control system of catastrophic airflow in metal mines [J].Coal Science & Technology Magazine,2019,40(3):17-19.
[14]周西华,白刚,孙宝铁,等.煤矿水平巷道火区瓦斯爆炸易爆区域判定研究[J].中国安全科学学报,2015,25(9):78-84. ZHONG Xihua,BAI Gang,SUN Baotie,et al.Research on judgement of gas easily explosive area in horizontal tunnel fire area of coal mine [J].China Safety Science Journal,2015,25(9):78-84.
[15]周西华,李诚玉,张丽丽,等.封闭过程中火区气体运移规律的数值模拟[J].中国地质灾害与防治学报,2015,26(2):116-122. ZHOU Xihua,LI Chengyu,ZHANG Lili,et al.Numerical simulation of gas transport law in process of sealing fire zone [J].The Chinese Journal of Geological Hazard and Control,2015,26(2):116-122.
[16]文虎,张铎,郑学召.煤矿平巷火灾数值模拟及其特征参数研究[J].煤炭科学技术,2017,45(4):62-67. WEN Hu,ZHANG Duo,ZHENG Xuezhao.Study on numerical simulation and feature parameters of fire disasters occurred in mine roadway [J].Coal Science and Technology,2017,45(4):62-67.

相似文献/References:

[1]张龙,袁树杰,朱成涛.俯采工作面采空区“三带”分布研究[J].中国安全生产科学技术,2013,9(5):67.[doi:10.11731/j.issn.1673-193x.2013.05.013]
 ZHANG Long,YUAN Shu jie,ZHU Cheng tao,et al.Study on distribution of “Three Zones” in goaf of fully mechanized underhand mining face[J].JOURNAL OF SAFETY SCIENCE AND TECHNOLOGY,2013,9(4):67.[doi:10.11731/j.issn.1673-193x.2013.05.013]
[2]邬云龙,谭波.基于粗糙集Skowron差别矩阵的矿井火灾风险评价指标约简[J].中国安全生产科学技术,2016,12(5):60.[doi:10.11731/j.issn.1673-193x.2016.05.011]
 WU Yunlong,TAN Bo.Reduction of risk assessment indexes for mine fire based on Skowron discernibility matrix of rough set theory[J].JOURNAL OF SAFETY SCIENCE AND TECHNOLOGY,2016,12(4):60.[doi:10.11731/j.issn.1673-193x.2016.05.011]

备注/Memo

备注/Memo:
收稿日期: 2020-01-06
* 基金项目: 国家重点研发计划项目(2018YFC0808100);国家自然科学基金项目(51874012)
作者简介: 贾静,硕士研究生,主要研究方向为矿井通风与安全。
更新日期/Last Update: 2020-05-11