火灾位置对掘进巷道通风及继发性灾害的影响  

Influence of fire location on ventilation and secondary catastrophes in tunnels

作　　者：李坤[1] 全加[1] 由长福[1] 杨瑞昌[1] 

机构地区：[1]清华大学热能工程系,热科学与动力工程教育部重点实验室,北京100084

出　　处：《清华大学学报（自然科学版）》2010年第2期270-273,共4页Journal of Tsinghua University(Science and Technology)

基　　金：国家科技支撑计划项目(2006BAK03B04)

摘　　要：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。The influence of fire location on the ventilation, temperature, and gas distribution in a tunnel has been investigated to find the conditions leading to secondary catastrophes such as mine gas explosions when the ventilation tube operates normally. The results show that for a given fire intensity, the ventilation resistance and the relative volumetric air flow rate increase, the area having higher temperatures increases, and the coal gas concentration decreases as the distance between fires and the tunnel end increases. When fires are not at the tunnel end, the fire locations are not the main factor inducing secondary catastrophes such as gas explosions.

关 键 词：矿井通风 瓦斯爆炸 掘进巷道 火灾位置 继发性灾害 

分 类 号：TD712.73[矿业工程—矿井通风与安全]