Influence of Air Leakage on the Risk of Spontaneous Combustion in Close Coal Seam Groups

被引:0
作者
Li, Cong [1 ]
Pan, Rongkun [1 ,2 ,3 ,4 ]
Wang, Chenhui [1 ]
Jia, Hailin [1 ]
Wang, Jian [1 ]
机构
[1] Henan Polytech Univ, Dept Safety & Sci Engn, Jiaozuo, Peoples R China
[2] Henan Polytech Univ, Collaborat Innovat Ctr Coal Work Safety & Clean Hi, Jiaozuo, Peoples R China
[3] Henan Polytech Univ, Henan key Lab prevent & cure mine methane & fires, Jiaozuo, Henan, Peoples R China
[4] Henan Polytech Univ, Dept Safety & Sci Engn, Jiaozuo 454003, Peoples R China
基金
中国国家自然科学基金;
关键词
Air leakage action; close coal seam; spontaneous combustion risk; secondary oxidation; coal spontaneous combustion; SECONDARY OXIDATION;
D O I
10.1080/00102202.2022.2152683
中图分类号
O414.1 [热力学];
学科分类号
摘要
To study the effect of air leakage on the risk of spontaneous combustion of close coal seam clusters, the heat release characteristics and microstructural evolution of coal samples during primary and secondary oxidation at different air volumes were compared with the help of a high precision calorimeter and an X-ray diffractometer. The Arrhenius formula was applied to calculate the effect of different air volumes on the activation energy. The results show that: The effect of air volume on coal spontaneous combustion is found to have stage adaptation, low airflow is more conducive to coal self-ignition in the pre-heat storage, and the effect of high air volume on coal spontaneous combustion becomes increasingly significant after the temperature rises to a certain degree. The effect of air volume on secondary oxidation and primary oxidation has high affinity. The risk of spontaneous combustion of secondary versus primary oxidation is not absolute, but there is a critical temperature, and secondary oxidation has a higher risk of spontaneous combustion only when the temperature is higher than the critical temperature. The effect of wind volume on the morphological characteristics of the aromatic layer structural unit is achieved mainly by changing the side chain structure.
引用
收藏
页码:2806 / 2822
页数:17
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