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为了研究矿井瓦斯爆炸继发性灾害发生的规律及影响条件,采用数值分析方法研究了风筒正常工作时火灾位置对掘进巷道通风、温度及瓦斯体积分数分布的影响。结果表明:相同火灾强度下,随火灾位置距掘进端面距离的增加,巷道通风阻力及通风量减少比例增大,巷道内高温区域变大,而体积分数较高的瓦斯的分布范围变小;当火灾不发生在掘进端面,火灾位置并非是影响瓦斯燃烧或爆炸等继发性灾害发生的主要条件。
In order to study the regularity and influence conditions of mine secondary gas explosion disaster, numerical analysis was used to study the influence of fire position on ventilation, temperature and gas volume fraction distribution in roadway during normal operation. The results show that under the same fire intensity, with the increase of the distance from the tunneling end to the location of fire, the ratio of ventilation resistance and ventilation in the roadway increases, the high temperature region in the roadway becomes larger, and the distribution of gas with higher volume fraction becomes smaller. Fire does not occur in the tunneling end, the location of the fire is not the main conditions that affect the occurrence of secondary disasters such as gas combustion or explosion.