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金属矿山 ›› 2016, Vol. 45 ›› Issue (01): 171-174.

• 安全与环保 • 上一篇    下一篇

人员对巷道风速测量影响的数值模拟分析

李艳昌1,2,张箭1,2,杨雨濛1,2,刘剑1,2   

  1. 1.辽宁工程技术大学安全科学与工程学院,辽宁 阜新 123000;2.矿山热动力灾害与防治教育部重点实验室,辽宁 葫芦岛 125105
  • 出版日期:2016-01-15 发布日期:2016-03-11
  • 基金资助:

    * 国家自然科学基金项目(编号:51174265)。

Numerical Simulation Analysis of Pedestrian's Influence on Airflow Velocity Measuring in Roadway

Li Yanchang1,2,Zhang Jian1,2,Yang Yumeng1,2,Liu Jian1,2   

  1. 1.College of Safety Science and Engineering,Liaoning Technical University,Fuxin 123000,China;2.Key Laboratory of Mine Thermodynamic Disasters and Control of Ministry of Education,Huludao 125105,China
  • Online:2016-01-15 Published:2016-03-11

摘要: 为探究造成矿井风速测量读数振荡的原因,更准确地选择测量位置与测量方法,利用数值模拟的手段,根据现场实际,选取了测风点之前有行人干扰的5个情况,对在其影响下的风流速度场进行数值模拟。揭示了不同干扰情况下的巷道风流速度分布特征,分析了人的阻碍对风速测量的影响范围。其中,当单人站在巷道侧时,身后迎风向左侧的振荡区域充分发展,在其后20 m处测点的风速差依然有0.76 m/s;情况5为3个人在其身后形成的振荡区域互相影响抵消,在其后20 m处的速度差只有0.04 m/s。结果表明:由于人的存在,在人后方会形成风流的速度振荡区域,其正后方速度减小,两侧速度增大,若振荡充分发展则其衰减较慢。模拟结果对井下风速测量有一定的实际应用与参考价值。

关键词: 通风, 数值模拟, 巷道风速

Abstract: To explore the cause of airflow velocity reading disorder and accurately select the surveying location and methods,the numerical simulation was adopted to selecting five typical situations that are disturbed by the pedestrian to simulate the airflow field affected by the pedestrian.Then the distributive characteristic of airflow velocity was revealed in different situation,and the range of the pedestrian's influence on the airflow velocity measuring was analyzed.Among them,when one person stands on the side of roadway,the oscillating area the behind the wind to the left has full development,and the velocity difference is still to be 0.76 m/s at the monitoring line 20 m behind the people.At situation 5,the oscillation areas behind three people are balanced out with each other,and the velocity difference is only to be 0.04 m/s at the monitoring line 20 m behind the people.The conclusions showed that due to the person's existence,there will be a velocity disorder region behind the person.The velocity will be slow down behind person but it will be increased at his side.The oscillation will be attenuated slowly if let it grow freely.The simulation result has certain reference and practical application value for measuring airflow velocity at underground.

Key words: Ventilation, Numerical simulation, Airflow velocity in roadway