独头巷道瓦斯爆炸的数值模拟  

Numerical Simulation of Gas Explosion in Heading Face

作　　者：陈晓坤[1,2] 郭丽萍[1,2] 程方明[1,2] 师吉林[1,2] 

机构地区：[1]西安科技大学能源学院,陕西西安710054 [2]河南理工大学河南省煤矿瓦斯与火灾防治重点实验室,河南焦作454003

出　　处：《煤矿安全》2012年第7期20-22,共3页Safety in Coal Mines

基　　金：国家自然科学基金资助项目(50904049);西安科技大学培育基金资助项目(2010047);教育部创新团队资助项目(IRT0856);陕西省科技攻关资助项目(2010KJXX-08);河南省煤矿瓦斯与火灾防治重点实验室开放基金资助项目(HKLGF201101)

摘　　要：建立了独头巷道内瓦斯爆炸的数学物理模型,借助流体动力学软件FLACS对充满不同浓度瓦斯气体、有无障碍物时的巷道进行了数值模拟。由模拟结果可以看出,瓦斯浓度和障碍物对瓦斯爆炸过程压力波的变化有较大的影响,爆炸压力波在沿巷道的传播过程中不是单调衰减,而是有波动的;无障碍物时,压力波传播曲线的变化幅度不大,有障碍物时,瓦斯爆炸过程中压力波的传播曲线变化幅度迅速增大。A mathematical model of gas explosion in heading face is established in this paper, using fluid dynamics software FLACS to simulate roadway filled with different concentrations of methane gas and with or without barrier, the simulation results show that concen- trations of methane gas and obstacles have a greater influence on pressure wave change in gas explosion process, the gas explosion pres- sure wave is not monotonic decay along the tunnel in propagation process, but there is fluctuation ; when there are no barriers, the ex- plosion pressure wave changes slightly; but with barriers, explosion pressure wave changes greatly and quickly.

关 键 词：独头巷道 瓦斯爆炸 压力波 数值模拟 

分 类 号：TD712.71[矿业工程—矿井通风与安全]