瓦斯煤尘多相爆炸与抑爆的相间耦合作用机理研究

The process of coal-dust hybrid mixture explosion and inerting is extremely complex because of the coupling behavior of gas-solid combustion. The explosion mechanism and critical parameter for hybrid mixtures explosion hazard evalution has not been revealed clearly. And now, related research is becoming a hot and difficult issue and the research results would have an important scientific significance for the development of hybrid explosion theory. Based on the entropy theroy of multiphase thermal system, the explosion mechanism coal-dust hybrid mixture would be investigated using experiments, theory analysis and numerical calculation combined methods. The aims of the research are listed below. First, the corelations between multiphase explosion phenomenon and gas-solid coupling characteristics would be revealed deeply. Second, one adaptive threshold model for the quantitative evaluation to the hybrid mixture are to be established. Third, the inerting limits and its responsing property to the multiple heterogeneous indicator parameters woud be illuminated. And finally, the explosion hazard gestating model and one artificial avtive pre-inerting method based on explosion hazard quantitative determination would be put forward correspondingly. In a word, the hybrid mixture explosion and inerting theory will be further developed by the present project. And, the research results would also provide some valuable theory guidance to the determination of safety critical threshold coal-dust explosion prevention and mitigations in the coal mine.

瓦斯煤尘多相爆炸及抑爆由于涉及气固两相物质的耦合燃烧，其过程极其复杂，特别是多因素耦合作用下多相体系爆炸临界参数确定及相间传输机理还尚未阐明，相关问题已成为当前国际研究的热点和难点，其对于丰富和发展“多相爆炸理论”具有重要的科学意义。本项目以多相热力系统的熵变基本原理为基础，采用理论分析、实验研究与数值计算相结合的手段，从微观与宏观两个角度对多相耦合体系的爆炸特性进行研究，目的在于揭示瓦斯煤尘多元多相体系的相间耦合与多相体系爆炸机理的内在联系，明确多相体系爆炸危险状态动态评价自适应临界判据的确定方法，阐明多相耦合体系抑爆的惰化极限及其随体系中各相组分的多元异构指标参数的响应关系，建立多相体系爆炸危险孕育的多因素耦合作用模型及基于“爆炸危险动态判定”的灾前人工主动干预方法。为煤矿井下瓦斯煤尘多相爆炸危险状态的动态评价及爆炸灾害的有效预防提供科学的理论依据。

项目研究以计划书规定的研究内容为基础，制定了详细的研究方案，研制加工了专业测试装置，并构建了详细测试方法。项目研究测定了典型煤尘的粒度及其分散度对煤尘试样爆炸强度的影响，构建了煤尘爆炸反应活性及危险程度评价方法，研究确定了不同煤尘试样的热动力学反应过程及其与爆炸强度参数间的耦合关系，确定了煤尘爆炸火焰传播速度的确定方法及其动态演化规律，探索发现了煤尘爆炸过程中粉体理化结构的演变规律，获得了煤尘爆炸过程中气体产物的生产规律及其与爆炸参数的变化关系，获得了煤尘爆炸气固残留物特征与爆炸严重程度之间的耦合关系，基于X射线衍射分析的煤尘爆炸前后结构演变规律，获得了煤的表面化学官能团结构特征及其对瓦斯吸附解吸的控制作用机制，确定了煤受热固体产物（多孔碳）对瓦斯等不同气体的选择性竞争吸附机理及其关键控制因素及其热力学规律。项目发表SCI论文11篇、EI论文1篇，成果支撑科研奖励4项，参加国内外学术会议4次，培养硕士研究生5名，项目研究圆满完成了计划书规定的预期目标。