Abstract:In order to study the local resistance characteristics of the damper roadway and the accurate calculation method of air volume, taking the underground damper roadway of a mine in Hengyang, Hunan as the research object, the method of combining field test and numerical simulation was used to study the air flow field and local resistance characteristics of different damper angles. Combined with the area of air flow passing through the area, the calculation formula of air volume in the damper roadway with the size of the damper and the maximum wind speed at the damper as independent variables was deduced. The results show that the ventilation resistance and resistance coefficient in the field test show a trend of “slow growth-rapid growth” with the increase of the damper angle; in the numerical simulation test, the wind speed gradually shows an uneven distribution with the increase of the damper angle. Comparing the results of the field test and the numerical simulation, it is found that the CFD simulation method can accurately predict the change law of the local resistance when the damper angle is below 60°; the air volume calculation formula constructed by the combination of CFD simulation and numerical analysis can accurately calculate the air volume of the damper roadway, which can provide accurate data for the monitoring of the mine ventilation system and the intelligent regulation of the air volume.
