Salami Oluwafemi B, Brune Jurgen F, Xu Guang
Department of Mining and Explosives Engineering, Missouri University of Science and Technology, Rolla, MO 65401 USA.
Department of Mining Engineering, Colorado School of Mines Golden, Golden, CO 80401 USA.
Saf Extrem Environ. 2025;7(2):6. doi: 10.1007/s42797-025-00119-0. Epub 2025 Mar 26.
This study investigates the intricacies of equipment fires in a blind development heading of an underground mine using computational fluid dynamics (CFD). A series of fire dynamic simulations (FDS) were conducted for various ventilation velocities in the main airway, and with different distance between the auxiliary ventilation duct outlet to the blind working face. The impacts of the ventilation velocity in the main airway, and separation distance between the duct outlet to the blind face on temperature distribution and smoke spread mechanism were investigated. The findings indicate that the distance of the auxiliary ventilation duct outlet to the working face has a strong impact on the smoke stratification beneath the airway ceiling. The high-velocity flow from the auxiliary duct leads to turbulent eddies characterized by high levels of fluctuating vorticity near the working face, and the extent of the turbulent region increases as the distance between the working face and the duct outlet increases. This implies that lesser distance between the duct outlet to the working face is safer to mitigate smoke dispersion due to fires in the blind face of an underground heading. Similarly, the ventilation velocity in the main airway was observed to influence the smoke back layering length although, the influence on fire smoke gas temperature in the blind heading was found to be negligible. The insight from this study will aid the future design and installation of auxiliary mine ventilation duct in the underground development heading with the aim of minimizing smoke dispersion and enhancing safe evacuation of personnel in the event of a fire emergency.
Numerical analysis of a large mining equipment fire is evaluated using CFDAuxiliary ventilation duct has a strong impact on fire-induce smoke stratificationHigh-velocity flow from auxiliary duct induces turbulent eddies near the blind faceTurbulent eddies prevent fire smoke stratification which hinders safe evacuation.
本研究利用计算流体动力学（CFD）研究了地下矿井盲巷掘进中设备火灾的复杂情况。针对主巷道中不同的通风速度以及辅助通风管道出口到盲巷工作面的不同距离，进行了一系列火灾动力学模拟（FDS）。研究了主巷道通风速度以及管道出口到盲巷工作面的距离对温度分布和烟雾扩散机制的影响。研究结果表明，辅助通风管道出口到工作面的距离对巷道顶板下方的烟雾分层有很大影响。辅助管道的高速气流在工作面附近产生了以高波动涡度为特征的湍流涡旋，并且随着工作面与管道出口之间距离的增加，湍流区域的范围也会增大。这意味着管道出口到工作面的距离越小，对于减轻地下巷道盲巷工作面火灾产生的烟雾扩散越安全。同样，观察到主巷道中的通风速度会影响烟雾回层长度，不过发现其对盲巷中的火灾烟雾气体温度的影响可以忽略不计。本研究的见解将有助于未来在地下开拓巷道中设计和安装辅助矿井通风管道，目的是在火灾紧急情况下尽量减少烟雾扩散并加强人员的安全疏散。
使用CFD对大型采矿设备火灾进行数值分析
辅助通风管道对火灾引发的烟雾分层有很大影响
辅助管道的高速气流在盲巷工作面附近引发湍流涡旋
湍流涡旋阻止火灾烟雾分层，从而阻碍安全疏散
