火灾时期矿山通风巷道“特征环”与“关键环”的分布特征研究
发布时间：2018-08-04 14:55
【摘要】：为研究火灾时期矿山通风巷道风流的流动特性,基于水平巷道及火灾的物理数学模型,采用数值分析方法,研究分析火灾时期巷道内紊流充分发展截面上"特征环"与"关键环"的分布规律。结果表明:同一火灾强度和同一通风风速下,通风巷道内风速"特征环"分布特征分别存在临界风速值和临界火灾强度值;矿井火灾时期,通风风速与火灾强度均是影响巷道内风速"特征环"分布的关键因素;当巷道内通风风速大于或等于5 m/s时,火灾下风流平均风速点的位置可由正常通风时期的"关键环"特征方程进行计算。
[Abstract]:In order to study the air flow characteristics of mine ventilation roadway during fire, based on the physical mathematical model of horizontal roadway and fire, a numerical analysis method is adopted. The distribution law of "characteristic ring" and "key ring" on the fully developed section of turbulent flow in roadway during fire period is studied and analyzed. The results show that under the same fire intensity and the same ventilation wind speed, the distribution characteristics of wind speed "characteristic ring" in ventilation roadway have critical wind speed value and critical fire intensity value, respectively. Ventilation wind speed and fire intensity are the key factors to influence the distribution of wind speed "characteristic ring" in roadway, when the ventilation wind speed in roadway is greater than or equal to 5 m / s, The location of the mean wind speed point under fire can be calculated by the characteristic equation of "key ring" in normal ventilation period.
【作者单位】： 中国劳动关系学院安全工程系;
【基金】：中央高校基本科研业务专项资金项目(17ZY001)
【分类号】：TD721
本文编号：2164231
[Abstract]:In order to study the air flow characteristics of mine ventilation roadway during fire, based on the physical mathematical model of horizontal roadway and fire, a numerical analysis method is adopted. The distribution law of "characteristic ring" and "key ring" on the fully developed section of turbulent flow in roadway during fire period is studied and analyzed. The results show that under the same fire intensity and the same ventilation wind speed, the distribution characteristics of wind speed "characteristic ring" in ventilation roadway have critical wind speed value and critical fire intensity value, respectively. Ventilation wind speed and fire intensity are the key factors to influence the distribution of wind speed "characteristic ring" in roadway, when the ventilation wind speed in roadway is greater than or equal to 5 m / s, The location of the mean wind speed point under fire can be calculated by the characteristic equation of "key ring" in normal ventilation period.
【作者单位】： 中国劳动关系学院安全工程系;
【基金】：中央高校基本科研业务专项资金项目(17ZY001)
【分类号】：TD721
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