局部反风在矿井外因火灾救援中的应用

Application of local reverse ventilation to exogenous fire rescue in coal mine

概述了阳煤三矿发生外因火灾事故中采用局部反风措施辅助救援的过程,提出了局部反风的具体方案和步骤。应用结果表明,风机启动后,风机出风量540 m3/min,风压588 Pa,使原780巷道风流方向反转。反风前,780大巷3500 m以内CO浓度0.5%,无瓦斯,温度达50℃,人员无法进入;反风后,CO很快消失,温度降低至28℃,为人员进入实施进一步救援提供条件。

The whole process of exogenous fire rescue with the aid of local reverse ventilation in No.3 coal mine of Yangquan Coal Industry（Group） Co.,Ltd was summarized and the detailed measurements on local reverse ventilation were put forward.The results showed that the exhaust volume was 540 m3/min at the wind pressure of 588 Pa after the air blower switched on,making the air flow reversed in No.780 laneway.Before the reverse ventilation,CO concentration at the distance of greater than 3500 m in the haulage entry was 0.5% at the temperature of 50 ℃,without gas,which is impossible for rescuers to enter.After the reverse ventilation,CO disappeared quickly and the temperature decreased to 28 ℃,which is possible for rescuers to enter.