煤矿通风巷道断面风速测定与变化规律研究

Research on Wind Speed Measurement and Change Law of Coal Mine Ventilation Roadway Section

本文主要根据布辛涅斯克理论与普朗特混合长理论对煤矿通风巷道的风速场分布规律进行理论分析,进而实现对通风巷道断面的风速测定与变化规律研究。技术人员利用CFD15超声波测风仪对风速进行具体测试,并得出以下结论:煤矿通风巷道的瞬时风速大小具有明显的脉动特征,脉动幅度最高可达平均风速的67%;巷道断面风速场的变化规律可用对数分布公式理想的描述出来,准确性可高达96%。

According to Businessk theory and Prandtl mixed length theory,this paper theoretically analyzes the distribution law of wind speed field in coal mine ventilation roadway,and then realizes the research on wind speed measurement and change law of ventilation roadway section.Technicians use CFD15 ultrasonic anemometer to test the wind speed,and draw the following conclusions:the instantaneous wind speed of coal mine ventilation roadway has obvious pulsation characteristics,and the pulsation amplitude can reach 67%of the average wind speed at the highest.