封闭火区注惰气引发瓦斯爆炸的数值模拟  

Numerical Simulation of Gas Explosion Caused by Nitrogen Injection in Sealed Fire Area

作　　者：朱迎春[1] 周心权[1] 王海燕[1] 王兵建[1] 

机构地区：[1]中国矿业大学(北京)煤炭资源与安全开采国家重点实验室,北京100083

出　　处：《矿业安全与环保》2009年第3期1-3,6,共4页Mining Safety & Environmental Protection

基　　金：国家重点基础研究发展计划(973计划)项目(2005CB221500);国家自然科学基金项目(50474031)

摘　　要：采用模拟软件FLUENT,针对高瓦斯矿井火灾,封闭火区后充注N2的火区状态发展变化过程进行数值模拟,得到惰气和瓦斯在火区内的运移规律。模拟结果表明,惰气射流推动瓦斯气体进入火区,从而引起瓦斯爆炸。模拟数据采用专门软件Tecplot进行后处理,通过对爆炸前火区状态的分析得到注惰气引发瓦斯爆炸的原因。模拟结果进一步验证了前人提出的注惰气引发瓦斯爆炸的观点,为实际封闭火区注惰气时防止瓦斯爆炸措施的实施提供了科学依据。Numerical simulation was made on the fire development process in the sealed fire area in a high gassy mine with the simulation software FLUNET after nitrogen injection.The migration regularity of nitrogen and methane in the fire area was attained.The simulated results showed that the nitrogen jet flow pushed methane forward to the fire area and caused methane explosion.After the data were processed by the specialized software Tecplot,it came to the reason that methane explosion was induced through the analysis on the fire area condition at the moment just before methane explosion.These reasonable results further verified the viewpoint that methane explosion could be induced by nitrogen injection and thus provided scientific basis for gas explosion prevention while nitrogen injection after fire area was sealed.

关 键 词：火区封闭 注氮 瓦斯爆炸 数值模拟 

分 类 号：TD75[矿业工程—矿井通风与安全]