A Comparison of Air Leakage Prediction Techniques for Auxiliary Ventilation Ducting Systems


This paper briefly reviews prediction techniques for determination of leakage and friction along auxiliary ventilation ducting systems. In order to compare various prediction techniques that have been developed over the past, a macroscopic investigation of air leakage and friction resistance of auxiliary ventilation ducting systems has been undertaken. Measurements were conducted on 450 and 915 mm diameter fabric ducting over 100 m duct length to determine frictional resistances and the extent of leakage. Due to the high degree of accuracy required and the large volume of data that needed to be collected, electronic pressure transducers were used with computer for data recording. Conceptual models that describe the leakage characteristics of auxiliary ventilation ducting systems were developed based on this information. It was found that these models provided good correlation with most of the existing prediction techniques. The experimental methodology relying on computer data acquisition has allowed the accuracy of measured values to be treated with a high degree of confidence. The reliability of the developed models allows prediction of leakage, frictional impedance and airflow with enhanced confidence.

Meeting Name

8th US Mine Ventilation Symposium (1999: Jun. 11-17, Rolla, MO)


Mining Engineering


The full-text document is available for download in the Mining Symposium

Keywords and Phrases

Auxiliary Ventilation; Duct Leakage; Leakage Coefficient; Leakage Prediction Techniques

Document Type

Article - Conference proceedings

Document Version


File Type





© 1999 Society for Mining, Metallurgy & Exploration Inc. (SME), All rights reserved.

Publication Date

17 Jun 1999