Influence of Ventilation Tube Rupture from Fires on Gas Distribution in Tunnel
The ventilation tube was an important equipment in tunnels. Although the ventilation tube used in most coal mines was hard to ignite, it can be destroyed by fires. Based on numerical simulation methods, the influence of ventilation tube rupture locations on gas distribution has been investigated when fires happen. The results show that when the ventilation tube ruptured, the flow rate of the ventilation tube increased as the distance between the rupture location and the tunnel end increasing. In addition, when the distance increased to a certain value, the second vortex appears but its scale decreased as the fire intensity increasing. When at the same rupture location, the maximum gas concentration increased first and then decreased as the fire intensity increasing. When the ventilation tube ruptured, the coal gas distribution shows an up-down -leftright-uniform pattern from the tunnel end to the outlet, and whether the second vortex appeared or not is a critical factor on deciding the detailed gas distribution in the former part of the tunnel.
tunnel ventilation tube rupture location gas accumulation fire
LI Run DING Cui YOU Changfu
China Academy of Safely Science and Technology, Beijing 100012, China Tinghua Universty, Beijing 100 China Academy of Safely Science and Technology, Beijing 100012, China China University of Mining and Tinghua Universty, Beijing 100084, China
国际会议
The First International Symposium on Mine Safety Science and Engineering (首届矿山安全科学与工程学术会议)
北京
英文
1278-1284
2011-10-27（万方平台首次上网日期，不代表论文的发表时间）