氮气与磷酸铵盐干粉射流幕对煤矿瓦斯爆炸诱导煤尘爆炸的抑制机理

煤矿瓦斯煤尘多相耦合爆炸与抑爆问题已成为当前国内外学者研究热点与难点。为了探索氮气与磷酸铵盐干粉射流幕对瓦斯爆炸诱导煤尘二次爆炸的抑制机理，从瓦斯爆炸引燃煤尘二次爆炸动力学演化规律及二次引爆评价模型、氮气与磷酸铵盐干粉射流幕抑制二次爆炸的动力学机制、氮气与磷酸铵盐干粉射流幕抑制二次爆炸的影响规律方面展开研究，解决瓦斯一次爆炸引爆煤尘二次爆炸的评价数学模型构建、氮气与磷酸铵盐干粉射流幕作用下瓦斯爆炸火焰运动轨迹可视化关键科学问题。探明瓦斯浓度、点火能量、煤尘质量对瓦斯一次爆炸引燃煤尘二次爆炸最大距离的影响规律，阐明氮气与磷酸铵盐干粉射流幕作用下瓦斯爆炸火焰微观结构的演化特征，建立角联管网内氮气与磷酸铵盐干粉抑爆的关键影响因素集，提出氮气与磷酸铵盐干粉射流幕抑制瓦斯煤尘二次爆炸的方法。研究成果可为煤矿井下瓦斯煤尘多相多次爆炸的隔爆抑爆提供一种新的方法，为瓦斯煤尘耦合灾害的防控研究提供参考。

The suppression of multi-phase-coupled explosion of gas and coal dust is one of main research topics in coal mines. This research proposal aims to gain some important insights of suppression mechanism of coal dust explosion induced by gas explosion with a jet curtain generated by nitrogen and ammonium phosphate in coal mines. The research will study the dynamic process of the dust explosion, establish a mathematical model for assessing the explosion initiation, investigate the effects of various factors contributing to the explosion suppression with the jet curtain, and then visualize the flame movement trajectory of the explosion subjected to the jet curtain suppression. The research will also study the effect of gas concentration, ignition energy and the mass of coal dust on the explosion, understand the dynamic characteristics of microstructure of explosion flame, and propose a method to suppress the explosion with the jet curtain generated with nitrogen and ammonium phosphate. The research will provide a new method for explosion suppression and the results will have wide implications in prevention and control of coupled hazards of gas and coal dust in coal mines.