In order to explore the influence of attapulgite powder on the methane explosion, a small-size semi-closed visual explosion experiment platform was built, and experiments were carried out. The effect of spraying powder on the whole process of methane explosion was studied when methane concentration was 7%, 8%, 9.5%, 11% and 12%, respectively. When the methane concentration was 11%, the maximum explosion overpressure dropped by modified spraying attapulgite powder was as high as 33.26%, and at the same time, the reduction rate of flame propagation velocity reached the maximum value of 36.65%. Furthermore, when the methane concentration was 9.5%, the experimental results when the powder spraying amount of modified attapulgite was 120 mg, 160 mg, 200 mg, 240 mg and 280 mg showed that when the powder spraying was 240 mg, the maximum explosive overpressure decreased by 33.14%, and the reduction rate of the peak flame propagation velocity reached the maximum value of 33.73%. Through the video images recorded by the high-speed camera, the flame structure, shape, color, etc. Were analyzed. The characterization analysis illustrated that the modified attapulgite powder has a small particle size, relatively large porosity and specific surface area. Also, it has a high weight loss rate. Combined with the results of characterization analysis, the explosion suppression mechanism of modified attapulgite powder was discussed. It was found that the modified attapulgite powder could effectively absorb the active free radicals generated in the explosion, and the modified new chemical components have a better thermal decomposition and endothermic effect and a better suppression of methane explosions.

为了探究凹凸棒石粉对甲烷爆炸的影响，搭建了小型半封闭可视化爆炸实验平台，并进行了实验。研究了甲烷浓度分别为7%、8%、9.5%、11%和12%时喷洒粉体对甲烷爆炸全过程的影响。当甲烷浓度为11%时，改性喷涂凹凸棒石粉末的最大爆炸超压下降高达33.26%，同时火焰传播速度的降低率达到最大值36.65%。此外，当甲烷浓度为9.5%时，改性凹凸棒石粉喷量为120 mg、160 mg、200 mg、240 mg和280 mg时的实验结果表明，粉喷量为240 mg时，最大爆炸超压下降了33.14%，峰值火焰传播速度下降率达到最大值33.73%。通过高速摄像机记录的视频图像，对火焰的结构、形状、颜色等进行了分析。表征分析表明，改性凹凸棒石粉体粒径小，孔隙率和比表面积较大。此外，它具有很高的减肥率。结合表征分析结果，探讨了改性凹凸棒石粉体的抑爆机理。发现改性凹凸棒石粉体能有效吸收爆炸产生的活性自由基，