334 / 2018-05-18 09:18:48

障碍物对泡沫金属阻抑瓦斯爆炸火焰速度影响实验研究

障碍物,泡沫金属,瓦斯爆炸,火焰速度

矿山职业健康与环境安全 > 防爆炸

障碍物对泡沫金属阻抑瓦斯爆炸火焰速度影响实验研究

魏春荣[基金项目：国家自然科学基金项目，泡沫金属阻抑瓦斯爆炸机理研究（51504086）；真三轴条件下含瓦斯
煤岩损伤与渗流耦合机理研究（51604101 ）
通信作者：魏春荣（1977.2-），女，黑龙江省七台河市人，副教授，博士研究生，从事矿井阻隔爆技术方面的研究. E-mail：wcrangle@163.com.]，石茜，张倍瑞，姜天文，张锦鹏
（黑龙江科技大学，安全工程学院，哈尔滨，150022）

摘 要：为了更好地保证煤炭生产安全，降低瓦斯煤尘爆炸灾害，抑制瓦斯煤尘二次爆炸，利用瓦斯煤尘爆炸系统，针对阻塞率15%、25%、40%，一层、三层、五层障碍物进行了泡沫铁镍金属阻抑瓦斯爆炸对比实验，研究不同参数组合下的障碍物存在时对泡沫铁镍金属阻抑瓦斯爆炸的效果影响。实验结果表明：阻塞率15%、25%、40%，一层、三层、五层障碍物存在时，泡沫铁镍金属对瓦斯爆炸火焰速度阻抑效果均降低；相同层数不同阻塞率障碍物存在时，随着管道内障碍物阻塞率逐渐增加，泡沫铁镍金属对瓦斯爆炸火焰速度阻抑效果逐渐减弱；相同阻塞率不同层数障碍物存在时，随着障碍物层数逐渐增加，泡沫铁镍金属对瓦斯爆炸火焰速度阻抑效果逐渐减弱。研究成果可以为泡沫铁镍金属在阻隔爆方面应用提供参考。
关键词：障碍物；泡沫金属；瓦斯爆炸；火焰速度
Experimental Study of Obstacle on Flame Velocity Effect of Foam Metal Inhibition on Gas Explosion

Wei Chunrong, Shi Qian, Zhang Beirui, Jiang Tianwen, Zhang Jinpeng
College of safety engineering,Heilongjiang University of Science and Technology,Harbin,150022
Abstract
In order to better ensure the safety of coal production, reduce the explosion of gas coal dust, and suppress the secondary explosion of coal gas dust,using the gas-dust explosion system, a foamed iron-nickel metal-resistance gas explosion comparison experiment was conducted for 15%, 25%, 40%, and one layer, three layers, five layers obstructions,to study the effect of foam iron-nickel metal on gas explosion suppression when obstacles with different combinations of parameters are present.The experimental results show that when the obstruction rates are 15%, 25%, 40%, and the one-layer, three-layer, and five-layer obstacles are present, the inhibition effect of foamed iron and nickel metal on the flame retardation of gas explosion is reduced;in the presence of the same number of obstructive obstacles, with the increase of obstruction rate in the pipeline, the inhibition effect of foamed iron nickel on the flame velocity of gas explosion gradually decreased;with the increase of the number of barrier layers, the inhibition effect of foamed metal on the flame velocity of gas explosion is gradually decreased.The product of the blocking rate and the number of layers is defined as the limit of obstacles. The research results can be used as reference for the application of foamed iron and nickel metal in barrier blasting.
Key word: Obstacle;foam metal;gas explosion;flame velocity