Abstract

The article presents the analytical research data on the convective motion dynamics and air temperature variation in a mine tunnel after cutoff of a drag source during fire. The single-valued prediction is only possible based on the stability theory of convection currents. The mathematical modeling of advection currents of counter air flows in a tunnel is performed at longitudinal gradient of temperature. The analytical formulas are obtained to calculate advection vortex and air flow velocity in vortex as function of burning time and temperature at the source. The range of hot airflow weakly depends on the burning temperature, insignificantly grows within a day and makes 850 m at the temperature of 1000°C. The developed procedure allows evaluating the fire size and duration, as well as the air flow velocities in tunnels after the drag source cutoff.

中文翻译：

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从暖平流的分析模型估计隧道中与火灾相关的参数

摘要

本文介绍了在火灾中切断拖曳源后矿井隧道内对流运动动力学和气温变化的分析研究数据。单值预测只能基于对流稳定性理论。在纵向温度梯度下进行隧道中逆向气流平流的数学建模。获得解析公式来计算平流涡和涡中的空气流速作为燃烧时间和源处温度的函数。热气流的范围微弱地依赖于燃烧温度，在一天内无显着增长，在 1000°C 的温度下达到 850 m。开发的程序允许评估火灾规模和持续时间，