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1.序言 在有关煤尘云爆炸的研究中,最多的是对爆炸下限浓度的研究,这一事实说明在防止煤尘爆炸措施上作为基础资料的爆炸下限浓度的重要性。然而,在有关爆炸下限的研究中,理论研究与实验研究相比是极少的。这说明在很大程度上尚未充分查明煤尘粒子的着火、燃烧过程等的基本现象。近年来,仍在对这些基本现象加以阐明。例如,已经查明在一定条件下,当煤尘粒子在其周围形成火焰开始燃烧之前,存在着没有火焰反应的即所谓的固-气相反应阶段等。作者根据这些成果,制作了固-气相反应着火、气-气相燃烧模型,并进行了模拟计算,这在前
1. Introduction The fact that most of the studies on coal dust cloud explosions are studies of the lower explosive limit concentration explain the importance of the lower explosive concentration as a basis for preventing coal dust explosions. However, in the study of the lower explosion limit, theoretical studies were scarce compared with experimental studies. This shows that to a large extent, the basic phenomenon of the ignition and burning process of coal dust particles has not been fully identified. In recent years, these basic phenomena are still being elucidated. For example, it has been ascertained that under certain conditions, there is a so-called solid-gas phase reaction stage without flame reaction, etc., before the coal dust particles form a flame around them to start burning. Based on these results, the author produced a solid-gas phase reaction ignition, gas-vapor phase combustion model and conducted a simulation calculation,