Powder Inhibition of Gas Explosion Research Progress and Development Trend

The domestic and international research status was reviewed, analyzing the explosion characteristics of inert powders, active powders, and composite powder explosion suppressants from the perspectives of maximum explosion pressure and flame propagation properties. The explosion suppression mechanisms of powder suppressants were also summarized. Analysis found that the inert powder is mainly from the physical aspects of heat absorption, oxygen dilution, and the formation of physical barriers to inhibit gas explosions; the active powder is mainly from the chemical aspects of the capture of free radicals to interrupt the explosion chain reaction inhibition of gas explosions; the composite powder is through the physical-chemical aspects of synergistic inhibition of gas explosions. Based on this, the directions for resolving urgent issues and the future research focus for powder explosion suppressants should not only involve the development of novel, green, and economical powders, but also actively advance towards conditions that more closely align with actual mine environments─such as multi-field coupling scenarios. Furthermore, the application of new technologies and intelligent systems should be emphasized to provide theoretical guidance for enhancing safety in coal mine production.