煤尘爆炸传播特性的实验研究  

Experimental study on propagation characteristics of coal dust explosion

作　　者：景国勋[1] 杨书召[1] 

机构地区：[1]河南理工大学安全科学与工程学院,河南焦作454003

出　　处：《煤炭学报》2010年第4期605-608,共4页Journal of China Coal Society

基　　金：国家自然科学基金资助项目(50674041);教育部长江学者和创新团队计划资助项目(IRT0618)

摘　　要：用实验方法,在长1.5m、直径0.3m的爆炸腔体与80mm×80mm方形断面管道对接的实验装置中进行煤尘爆炸传播特性研究。研究结果表明,爆炸火焰区传播距离远大于原始煤尘积聚区长度,爆炸传播过程中各测点冲击波压力出现先"升"后"降"变化,冲击气流衰减变化与爆炸煤尘量和断面有关,爆炸毒害气体并非一开始就扩散传播,而是在动压作用下冲击一段距离后开始扩散,可能存在膨胀极限区。Using experimental methods researched coal-dust explosion propagation characteristics in the long 1.5 m,diameter 0.3 m explosion cavities with 80 mm×80 mm square section of pipe butt experimental device.The test results show that the length of the flame zone is longer than the coal dust accumulation zone in the process of the explosion and explosion propagation process of shock wave pressure of all measuring points first increases and then decreases in attenuation characteristics.It also shows that the impact air of attenuation change is related to explosive energy and cross-section.Poison gas does not diffuse at begging,but it is out some distance away from explosion source.There may be expansion of the limit area for poison gas.

关 键 词：煤尘爆炸 传播特性 火焰区 冲击气流 毒害气体 爆炸压力 

分 类 号：TD714.5[矿业工程—矿井通风与安全]