Pneumatic traction unit

The sound of a pneumatic traction unit in operation. It was manufactured by the Czech Brano Group in 2000. It is indispensable to mining operations because it enables the lifting and moving of machines, equipment and material in the underground galleries where there is a severe lack of space. It is powered by compressed air at 5 bar pressure. It can lift up to 5-tonnes from floor to the ceiling and a combination of several such units allows movements in different directions.
The sound was recorded in the Trbovlje-Hrastnik coal mine which has a long tradition. The first mine in the Trbovlje area, founded by the entrepreneur Franz Maurer from Wiener Neustadt, Austria, started to operate in 1804. It was later followed by several smaller mines. The arrival of the Austrian Southern Railway to the Zasavje region in 1849 was a double gain: it facilitated the transport of coal to clients whilst simultaneously the railway itself was a major customer itself, having a great need for coal. In 1873 all the coal mines in Zasavje were merged under Trboveljska Premogokopna Družba (Trbovlje Coal Mining Company) which remained the proprietor until WWII. After 1946 all coal mines were nationalised by the new socialist authorities. Zasavje coal mines reached their peak of production and technological development in the second half of the 20th century. After 1991 coal was no longer considered the energy source of the future, and so the state decided to gradually close the mine. The extraction of coal ceased in 2010 and the company focused exclusively on closing it down which should be completed by 2018.

Sound recordist: Dušan Oblak
Photographer: Neža Renko