Research on leakage rate of positive pressure air duct based on mining air duct detection system
Based on the mining air duct detection system,the ventilation system operating conditions of the actual underground operation were simulated by controlling the local ventilation fan.The relationship between the air duct leakage rate and the three main factors of the mining air duct leakage hole area,hole position,and hole number was studied and analyzed.The results showed that when other structural parameters of the air duct remained unchanged,as the hole area increased,the air duct leakage rate increased in a quadratic curve,and a fitting curve equation was obtained.The error between the fitting data and the measured data was 2.7％;when other structural parameters of the air duct remained unchanged,as the distance between the hole position and the fan position increased,the air leakage rate of the air duct decreased in a linear relationship,with a minimum of 13.4％;when the other structural parameters of the air duct remained un-changed,as the number of air duct holes increased,the air leakage rate of the air duct increased in a quadratic curve,and fitting data was obtained.The error compared to the actual measurement data was 1.7％.Orthogonal experimental design was used to study the influence of three parameters,namely the area,position,and number of air leakage holes,on the air leakage rate of the air duct.The primary and sec-ondary order of influence on the air leakage rate of the air duct is:the diameter of the air leakage hole,number of air leakage holes,and lo-cation of air leakage holes.This study provides relevant data reference for improving the phenomenon of air duct leakage.
mining air duct detection systempositive pressure air ductleakage rate of air duct
万方数据
维普
