煤矿瓦斯爆炸事故具有很强的破坏性、突发性，是煤矿重大灾害事故之一。预防、控制瓦斯爆炸事故，是实现煤矿安全生产的关键。如何有效地把爆炸范围和可能造成的破坏限制在最小程度上，一直是安全工作者关注的焦点，为此如何有效的利用抑爆技术是人们研究的重要课题之一。 本文论述了国内外气溶胶抑爆技术的发展及应用现状，探讨了气溶胶的抑爆机理。采用20L近球形不锈钢爆炸罐实验系统，考察K型、S型两种气溶胶的抑爆性能和抑爆参数，定量、定性的分析点火延迟时间、气溶胶浓度、气溶胶发生罐体积等参数与甲烷爆炸特性参数之间的关系，总结出气溶胶的抑爆规律。 研究结果表明：S型气溶胶比K型气溶胶抑爆效果好，表现在S型气溶胶抑爆比K型气溶胶抑爆到达最大爆炸压力峰值的时间要长，且对爆炸极限范围的影响要大。随着气溶胶浓度的增加，甲烷最大爆炸压力、最大爆炸压力上升速率都不断减小，直至不再爆炸；且甲烷爆炸极限范围不断减小，甚至闭合。气溶胶发生罐体积的大小影响甲烷爆炸压力、甲烷爆炸压力上升速率和到达最大爆炸压力的时间。在气溶胶冲入20L近球形爆炸罐后，甲烷最佳爆炸浓度小于9.5%。同一密闭容器，同一实验条件下，抑制不同浓度甲烷爆炸，所需的气溶胶量不同；甲烷浓度为7%， K型气溶胶浓度大于等于480mg/L，S型气溶胶浓度大于等于405mg/L时，甲烷不爆炸；甲烷浓度为9.5%， K型气溶胶浓度大于等于315mg/L，S型气溶胶浓度大于等于270mg/L时，甲烷不爆炸。 本文结论和数据为气溶胶抑爆提供了理论依据，对煤矿瓦斯抑爆有一定的现实指导意义。

Gas explosion is one of the significant disaster accidents of coal mine, being strongly destructive and sudden. Preventing and controlling gas explosion accident is the key of achieving the safety production of coal mine. How to effectively limit the explosion scope and the possible damage at the lowest degree，which has been a concerning focus for the security workers. How to make the best to use the technology of powder explosion suppression , that is one of the important issues. This article described the development and the application of the technology of aerosol suppressing explosion in China and abroad?, discussed the suppression mechanism of aerosol .Carried out the suppressing explosion experiment using the K-type aerosol and S-type aerosol on the trial system of 20 L spherical stainless explosion container, studied the suppressing explosion performance and the suppressing explosion parameters about these two aerosol. Meanwhile, qualitatively and quantitatively analyzed the relationship between the ignition delay time, the concentration of aerosol, the container size of generation aerosol and the explosion characteristics parameters, got the measure of the suppressing explosion law of aerosol. The experimental results show that: the suppressing explosion effect of S-type aerosol is better than the effect of K-type aerosol,under the condition of S- type aerosol, the time from collecting pressure to arriving the maximum explosion pressure is longer than K-type aerosol , and the impact on the explosive limits is greater than K-type aerosol. With the concentration of aerosol increasing, both the maximum explosion pressure and the average rise speed of maximum pressure decreases continuously until the explosion does not occur. And the the explosive limits decreases until the upper limit joints with the lower limit. Besides that, the container size of generation aerosol which is different may be also influence the maximum explosion pressure, the average rise speed of maximum pressure and the time from collecting pressure to arrive the maximum explosion pressure.Then adding the aerosol into 20 L spherical stainless explosion container, the best explosion of methane concentration will be less than 9.5%.In the same airtight container and the same condition, suppressing different concentration of methane explosion, needing different amount of aerosol. When K-type aerosol concentration is greater than or equal to 480mg / L, S-type aerosol concentration is greater than or equal to 405mg / L, the 7% methane explosion does not occur.And the K-type aerosol concentration is greater than or equal to 315mg / L, S-type aerosol concentration is greater than or equal to 270mg / L , 9.5% methane explosion does not occur. This paper’s conclusions and data can provide the theory basis for the explosion suppression of aerosol, and have a certain guiding sense for suppressing coal mine gas explosion.