基于FDS的风速对矿井火灾蔓延规律的影响研究*

为研究不同风速与火源功率共同作用下矿井火灾蔓延规律的变化，以安源煤矿378工作面为研究对象，建立FDS矿井巷道火灾全尺寸模型，设置火源功率分别为3，6 MW，风速分别为0.25，1.25，2.25，3.25 m/s的8种工况。研究结果表明:相同风速下，巷道内温度及相同位置CO浓度值随火源功率增大而升高，巷道内能见度随火源功率增大而降低，且火源功率越大，能见度降到零的火灾区域越大；相同火源功率下，巷道内温度及相同位置CO浓度值随着风速增加而升高，能见度随风速增加而降低；火灾蔓延速率与风速成正比，风速的增大加速下风向火灾的发展，但会减缓上风向火势的蔓延。

Study on influence of wind speed on spread law of mine fire based on FDS

In order to study the change in the spread law of mine fire under the combined action of different wind speeds and fire source power,taking the 378 working face of Anyuan coal mine as the research object,a full-scale model of mine roadway fire based on FDS was established,and eight working conditions were set with the fire source power of 3 and 6 MW and the wind speed of 0.25,1.25,2.25 and 3.25 m/s,respectively.The results showed that under the same wind speed,the temperature and the CO concentration at the same location in the roadway increased with the increase of fire source power,and the visibility in the roadway decreased with the increase of fire source power,the greater the fire source power,the greater the fire area where the visibility dropped to zero.Under the same fire source power,the temperature and the CO concentration at the same location in the tunnel increased with the increase of wind speed,and the visibility decreased with the increase of wind speed.The rate of fire spread was proportional to the wind speed,and the increase of wind speed accelerated the development of fire in the downwind direction,but it would slow down the fire spread in the upwind direction.