多孔材料对瓦斯、煤尘复合火焰微观结构及其传播特性影响的研究

项目名称： 多孔材料对瓦斯、煤尘复合火焰微观结构及其传播特性影响的研究

项目编号： No.51274205

项目类型： 面上项目

立项/批准年度： 2013

项目学科： 矿业工程

项目作者： 陈鹏

作者单位： 中国矿业大学（北京）

项目金额： 78万元

中文摘要： 煤矿井下发生的瓦斯、煤尘爆炸事故是最为严重的煤矿灾害，阻隔爆炸传播过程的机理研究和抑制技术用于瓦斯爆炸防治，是近年来人们研究矿井瓦斯爆炸防治的热点。本研究在可放置多孔材料的密闭燃烧管道内，利用高速显微摄像系统拍摄多孔材料前后的瓦斯、煤尘复合火焰自发光、纹影及激光散射显微图片的同时，结合压力传感器、离子探针和微细热电偶测量技术探测多孔材料前后复合火焰面附近的压力、离子电流和温度分布规律，揭示多孔材料作用下瓦斯、煤尘复合火焰微观结构；分析多孔材料类型、厚度、孔隙结构、煤的种类、浓度、粒度和瓦斯浓度对复合火焰传播及其失稳的影响规律；基于多相流体力学、燃烧学等理论基础，结合实验及模拟结果，确定多孔材料抑制瓦斯、煤尘火焰传播的临界条件和表征方法，寻找出多孔材料特性与抑制复合火焰传播之间的关系。本研究成果不仅能完善两相流火焰传播理论，同时为控制矿井爆炸事故提供坚实的理论基础和可靠的实验数据。

中文关键词： 多孔材料；瓦斯;煤尘；瓦斯火焰；微观结构；失稳机理

英文摘要： The methane and coal dust explosion accidents are the most severe disasters in the coal mines. In recent years, the research of preventing gas explosion and alleviating the damage focuses on the mechanics of blocking explosion propagation and substantially suppressing the shock waves resulting from gas explosions. A rectangular deflagration test pipe was designed, which has a 100mm×100mm cross-section and is similar in shape to the roadways in coal mines. The experimental platform on hybrid flame fine structure is built up, which includes the high-speed Schlieren photograph system, the high-speed photomicrography combined with laser light, the ion current probe measurement system, super thin thermocouple system and pressure transducer system. The microscopic structures of hybrid flame impacted by porous materials are disclosured by both high-speed photomicrography (photomicrographs of laser scattering images, high-speed Schlieren photograph, self-luminous images.) and the flame structure parameters (wave pressure, ion current intensity and temperature), which are examined by the flame fine structure experimental platform. The effect rules of hybrid flame propagation and transition mechanism affected by the types，thickness and pore structures of porous materials, the species, density and granularity of coal par

英文关键词： porous materials；methane and coal dust；methane flame；microstructure；transition mechanism