摘要
在地下矿井发生意外事件后,快速确定矿井内部通风状态对于矿工和救援队伍做出有效决策至关重要。开发了一种将示踪气体和计算流体力学模型相结合的方法,用以在事故后预测矿井通风系统内部的流场。实验在一个实际的地下矿井中进行,使用SF6气体作为示踪气体分别测试了事故中最容易出现的四种通风状态下矿井巷道中的示踪气体分布,同时使用CFD对混合效应和扩散效应复杂的关键区域进行了精确预测。研究发现,模拟与实验的误差在大约在10%以内,加压风机的开关对巷道中的示踪气体分布几乎没有影响,而停止门的开启可以使得巷道中的示踪气体浓度下降2000ppb左右。因此在实际运行中因尽量采取措施确保停止门在事故后的开启。这项工作为事故后远程识别通风系统损坏的程度提供了参考。
After accidents in underground mines,rapidly determining the internal ventilation status of the mine is crucial for effective decision-making for both miners and rescue teams.This study has developed an approach that combines tracer gases and computational fluid dynamics(CFD)models to predict the airflow within the mine ventilation system following accidents.Experiments were conducted in an actual underground mine where SF6 gas was used as a tracer gas to test the distribution of tracer gas in the mine drift under four common ventilation conditions that can occur during accidents.Simultaneously,CFD was employed to accurately predict the complex mixing and diffusion effects in critical areas.The research revealed that the error between simulation and experiments was within approximately 10%.The operation of the booster fan had minimal impact on the distribution of tracer gas in the drifts,whereas the opening of stopping resulted in a decrease of approximately 2000 ppb in the tracer gas concentration within the drifts.Therefore,in practical operation,it is advisable to take measures to ensure that stoppings are opened following accidents.This work provides a reference for assessing the extent of damage to the ventilation system remotely after accidents.
作者
朱振锋
刘同欢
石军安
Zhu Zhenfeng;Liu Tonghuan;Shi Junan(Shaanxi Huabin Coal Co.,Ltd,Jiangjiahe Coal Mine,Xianyang,713509;Shanghai Coal Science Information Technology Co.,Ltd,Shanghai,200030)
出处
《制冷与空调（四川）》
2024年第1期112-118,147,共8页
Refrigeration and Air Conditioning
关键词
矿井通风系统
示踪气体
计算流体力学
流场模拟
Mine ventilation system
Tracer gas
Computational fluid dynamics
Flow fields simulation
