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考虑井下巷道内阻塞物对临界风速的影响,通过理论分析得到存在阻碍物时井巷火灾的临界风速计算公式。采用FDS计算流体软件,对不同阻塞比、火源在阻碍物下游/阻碍物上及火源-阻碍物不同间距时的临界风速进行了模拟研究。结果表明:随阻塞比增大临界风速减小;火源在阻碍物上较在阻碍物下游时的临界风速大;随火源-阻碍物距离逐渐变大,临界风速趋于无阻碍时的临界风速。对理论和模拟结果进行了相关系数检验,公式计算与模拟结果之间存在显著相关性。
Considering the influence of blockage on the critical wind speed in the underground roadway, the critical wind speed calculation formula of the well laneway with the obstacle is obtained by theoretical analysis. The FDS computational fluid software was used to simulate the critical wind speeds at different blockage ratios, the source of the fire at the obstruction / obstacle and the source / obstruction at different distances. The results show that the critical wind speed decreases with the increase of the blockage ratio. The critical wind speed of the fire source when the obstacle is downstream is larger than that of the obstacle. With the distance between the source and the obstacle becoming larger, the critical wind speed tends to be unobstructed Wind speed. The correlation coefficient between the theoretical and simulation results was tested, and there was a significant correlation between the formula calculation and simulation results.