转弯结构对其前方直巷内气体爆炸冲击波的影响（英文）

发布时间：2018-04-04 12:03

本文选题：气体爆炸　切入点：转弯结构　出处：《高压物理学报》2017年04期

【摘要】：转弯结构是煤矿巷道最基本的建筑单元之一。研究转弯结构对井下瓦斯爆炸的影响规律有助于煤巷抗爆能力评估和优化设计。基于此,借助数值模拟研究了不同转弯条件下转弯前直巷道内局部瓦斯爆炸流场,重点分析了转弯前直巷道内冲击波传播规律。研究表明:对于同一转弯结构,越靠近转弯位置,与直巷道内相应位置处的爆炸冲量的差异越明显;对于不同的转弯结构,转弯角度越大,与直巷道相应位置处的爆炸冲量的差异则越大。基于反射波对转弯前直巷道内原始冲击波的影响,建立了临界尺度距离随转弯角度的定量关系。在转弯处,爆炸冲量随转弯角度的增加而增大,与直巷道相应位置处的爆炸冲量相比,其增长比例随转弯角度的增大呈非线性增长。
[Abstract]:Turning structure is one of the most basic building units in coal mine roadways.The study of the influence of turning structure on underground gas explosion is helpful to evaluate and optimize the anti-explosion ability of coal roadway.Based on this, the local gas explosion flow field in the straight roadway before turning under different turning conditions is studied by numerical simulation, and the propagation law of shock wave in the straight tunnel before turning is analyzed emphatically.The study shows that for the same turning structure, the closer it is to the turning position, the more obvious is the difference between the explosion impulse at the corresponding position in the straight roadway, and the bigger the turning angle is for the different turning structure.The difference between the explosion impulse and the corresponding position of the straight roadway is greater.Based on the effect of reflected wave on the original shock wave in the straight tunnel before turning, the quantitative relationship between critical scale distance and turning angle is established.At the corner, the explosion impulse increases with the increase of the turning angle. Compared with the explosion impulse at the corresponding position of the straight roadway, the increasing proportion of the explosion impulse increases with the increase of the turning angle.
【作者单位】：北京石油化工学院安全工程学院;灭火救援技术公安部重点实验室;中国人民武装警察部队学院;
【基金】：National Natural Science Foundation of China(51404029,51604031) Open Project of Key Laboratory of Ministry of Public Security of Fire Fighting and Rescue Technology(KF201607)
【分类号】：TD263;TD712.7

【相似文献】