矿井复杂风网火灾风烟流应急调控技术及应用

Research and application of fire air and smoke flow emergency control technology for mine complex ventilation network

针对复杂通风网络井巷火灾预防和应急救援较困难现状,分析了风流场、温度场、烟流浓度场的风流扰动、热量传递、烟流扩散等规律。根据不同火源位置的烟流演化规律,提出一种能够同时满足排烟风量和采场风量需求的火灾风烟流应急联动调控方案。以鄂尔多斯转龙湾煤矿为应用案例,建立了转龙湾煤矿火灾烟流应急联动调控系统。为分析其控风排烟效果,结合实际的井巷和通风参数,基于Ventsim软件构建了其复杂通风网络三维可视化模型。运用VentFire模块对其不同火源位置火灾场景的风烟流蔓延效果进行模拟。分析了采取应急调控方案前后的排烟效果和风量分配情况。结果表明:当不同位置发生火灾时,及时启动应急排烟方案,在满足排烟风量的基础上其他各关键地点的风量仍能保证正常通风时的90%以上,能够满足转龙湾煤矿灾变期间的控灾、救灾需求。

In view of the difficult situation of fire prevention,control,disaster resistance and relief in complex ventilation networks,the laws of air flow disturbance,heat transfer and smoke flow diffusion in air flow field,temperature field and smoke flow concentration field are analyzed.According to the evolution law of smoke flow at different fire source locations,an emergency linkage regulation scheme of fire air and smoke flow that can simultaneously meet the requirements of smoke exhaust air volume and stope air volume is proposed.Taking Zhuanlongwan Coal Mine as an application case,the fire smoke emergency linkage control system of Zhuanlongwan Coal Mine was established.In order to analyze the effect of air control and smoke exhaust,combined with the actual tunnel and ventilation parameters,a three-dimensional visualization model of its complex ventilation network was built based on VENTSIM software.The VentFire module is used to simulate the wind and smoke spreading effect of the fire scene in different fire source locations.The smoke exhaust effect and air volume distribution before and after the emergency control scheme is adopted are analyzed.The results show that when a fire occurs in different locations,the emergency smoke exhaust scheme should be started in time.On the basis of meeting the smoke exhaust air volume,the air volume of other key locations can still ensure more than 90%of the normal ventilation period,which can meet the disaster control and relief needs during the disaster of Zhuanlongwan Coal Mine.