|Document ID (ISN)||36053|
|ISSN - Serial title
||0342-5681 - Bergbau
|Convention or series no.
||Schlńger P., Meffert B., Christensen H.
||High-performance secondary ventilation installations
||Hochleistungs-Sonderbewetterungsanlagen [in German]|
||July 1980, Vol.31, No.7, p.408-414. Illus.
||With the mechanisation of roadway driving and the increase in roadway cross section, there has been a significant increase in conduit diameter (1-2m). Work at higher temperatures and the increase in installed electrical power entail air flow rates several times higher than the officially specified minimum levels. The effectiveness of long ventilation lines depends on the characteristics and strength of the fabric used for air conduits. The forces to which conduits are subjected are analysed and the characteristics of new fabrics are reviewed (in particular synthetic fabrics). Calculation of ventilation line performance and tear strength required for fabrics as a function of conduit diameter. A mathematical analysis shows the effect of leakage on performance and emphasises the need for non-leak conduits.
||ducts; mining industry; mine ventilation; tunnelling
||strength of materials; mathematical analysis; synthetic fibres
||D - Periodical articles
||Heating, ventilation and climate
|Broad subject area(s)
Mining and quarrying
Compressed gases and pressure vessels