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采空区瓦斯涌出情况对瓦斯浓度及自燃带分布的影响

王春霞, 艾德春, 杨付领

王春霞, 艾德春, 杨付领. 采空区瓦斯涌出情况对瓦斯浓度及自燃带分布的影响[J]. 煤矿安全, 2017, 48(11): 163-166.
引用本文: 王春霞, 艾德春, 杨付领. 采空区瓦斯涌出情况对瓦斯浓度及自燃带分布的影响[J]. 煤矿安全, 2017, 48(11): 163-166.
WANG Chunxia, AI Dechun, YANG Fuling. Influence of Goaf Gas Emission on Gas Concentration and Spontaneous Combustion Zone Distribution[J]. Safety in Coal Mines, 2017, 48(11): 163-166.
Citation: WANG Chunxia, AI Dechun, YANG Fuling. Influence of Goaf Gas Emission on Gas Concentration and Spontaneous Combustion Zone Distribution[J]. Safety in Coal Mines, 2017, 48(11): 163-166.

采空区瓦斯涌出情况对瓦斯浓度及自燃带分布的影响

Influence of Goaf Gas Emission on Gas Concentration and Spontaneous Combustion Zone Distribution

  • 摘要: 利用Fluent软件,对采空区瓦斯为均匀涌出、分段均匀涌出及连续涌出条件下的采空区瓦斯浓度及自燃带分布情况进行了数值模拟研究。结果表明:瓦斯均匀涌出时,采空区浅部的瓦斯浓度低于分段均匀涌出及连续涌出下的瓦斯浓度,在采空区深部其瓦斯浓度高于其他2种情况下的瓦斯浓度。针对瓦斯分段均匀涌出与连续涌出2种情况,采空区浅部区域两者瓦斯浓度相差不大;而在采空区深部,前者瓦斯浓度要大于后者。瓦斯均匀涌出时,其自燃带宽度较其他2种情况小;瓦斯分段均匀涌出时,其自燃带宽度比瓦斯连续涌出时略大。对采空区流场进行研究时,将瓦斯考虑为均匀涌出或者分段均匀涌出都是不准确的,应根据采空区瓦斯涌出的实际特点进行研究。
    Abstract: By using Fluent software, we carried out the numerical simulation for the gas concentration of goaf and spontaneous combustion zone distribution of different cases of gas emission including uniform emission, subsection uniform emission and continuous emission condition. The results show that: when the gas emission is uniform, the gas concentration in the shallow part of the goaf is lower than that of subsection uniform emission and continuous emission, and the gas concentration in the deep part of the goaf is higher than that of the two other cases. In view of the two conditions of the gas uniform emission and continuous emission, the gas concentration of the two cases in the shallow area of the goaf is not large, but, in the deep part of the goaf, the gas concentration that of the former is greater than that of the latter. When the gas emission is uniform, the width of spontaneous combustion zone is smaller than of the two other cases, but when the gas emission is subsection uniform, the width of spontaneous combustion zone is slightly larger than that of the continuous gas emission. So in the study of the flow field in the goaf, it is not accurate to consider the gas emission as uniform and subsection uniform, we should be study it based on the actual characteristics of gas emission.
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  • 发布日期:  2017-11-19

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