Abstract

Mine gas explosion seriously threatens the safety of coal mine production. Existing gas explosion control materials and technologies cannot effectively control the occurrence of gas disasters. Aiming at the current limitations of powder explosion suppressants in suppressing gas explosions in mines, this paper analyzes the special flame retardant and explosion suppression effects of nano powders from the suppression effect of free radicals in the explosion process based on the theory of surface effects of nano powders. The anti-explosion mechanism of nano-powder on mine gas, and the performance characterization parameters of nano-anti-explosion powder were proposed. In this paper, the self-improved 20 L near-spherical gas explosion suppression experiment system is used to perform the explosion suppression experiment of nanometer powder. The results of this study show that compared with micron-level powders, nano-powders have a better anti-explosion effect. The maximum explosion pressure and average rate of pressure rise of methane have decreased by 70.5% and 90%, respectively, and the peak time of explosion pressure has been extended by 3 times. Therefore, thenano-explosion suppressing powder material can suppress the gas explosion in the mine and can effectively control the occurrence of gas disasters.

摘要

煤矿瓦斯爆炸严重威胁煤矿生产安全。现有的瓦斯防爆材料和技术无法有效控制瓦斯灾害的发生。【摘要】：针对目前粉体抑爆剂在抑制矿井瓦斯爆炸方面存在的局限性,基于纳米粉体表面效应理论,从爆炸过程中自由基的抑制作用出发,分析纳米粉体的特殊阻燃和抑爆效果。粉末。提出了纳米粉体对矿井瓦斯的抗爆机理，以及纳米抗爆粉体的性能表征参数。本文采用自行改进的20L近球形气体抑爆实验系统进行纳米粉体抑爆实验。本研究结果表明，与微米级粉体相比，纳米粉体具有更好的防爆效果。甲烷最大爆炸压力和平均压力上升率分别下降了70.5%和90%，爆炸压力峰值时间延长了3倍。因此，纳米抑爆粉体材料可以抑制矿井瓦斯爆炸，有效控制瓦斯灾害的发生。