在地下开发项目中对设备发生火灾的CFD分析,以改进辅助通风设计
Oluwafemi B Salami1, Jurgen F Brune2, Guang Xu1
1Department of Mining and Explosives Engineering, Missouri University of Science and Technology, Rolla, MO 65401 USA.
概括
在地下矿山中,减少辅助通风管与工作面之间的距离对于减轻设备火灾烟雾至关重要. 这一策略破坏了烟雾分层,提高了紧急情况下的安全性.
科学领域:
- 采矿工程 采矿工程 采矿工程
- 消防安全科学 消防安全科学
- 计算流体动力学 (CFD) 是一种计算流体动力学.
背景情况:
- 地下矿开发项目容易发生设备火灾.
- 有效的通风对于控制火灾引起的烟雾和确保人员安全至关重要.
- 了解烟雾传播机制对于设计适当的安全协议至关重要.
研究的目的:
- 调查辅助通风参数对盲目地下矿头设备火灾动态的影响.
- 分析通风速度和通道距离对烟雾温度和传播的影响.
- 为优化辅助通风设计提供见解,以尽量减少火灾期间的烟雾分散.
主要方法:
- 利用计算流体动力学 (CFD) 来进行火力动力学的数值分析.
- 在各种通风条件下进行火力动态模拟 (FDS).
- 主气道通风速度和辅助管道出口到面距离的变化.
主要成果:
- 辅助通风管的距离显著影响了气道天花板以下的烟雾分层.
- 来自辅助管道的高速空气流会在工作面附近产生流,阻碍烟雾分层.
- 管道出口和工作面之间的距离增加会放大流区域,减少分层.
- 主气道通风速度影响烟雾回层的长度,但对火灾烟雾气体温度的影响微不足道.
结论:
- 辅助通风管出口与工作面之间的距离较短,对于减轻火灾造成的烟雾分散来说更安全.
- 由高速辅助空气流引发的旋旋有效地防止了火灾烟雾分层,这对于安全疏散至关重要.
- 这些发现有助于设计和安装矿山辅助通风系统,以提高消防安全和人员疏散.
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