In the breaking rooms in a subterranean mine, among other things, air is polluted by diesel vehicles and blasting. Creating the ventilation able to remove the pollutants is a complicated business.
“This was an important piece of the puzzle to even allow mining to continue in Kristineberg. In this way, we could push an expensive investment in a new ventilation shaft into the future,” says Mats Isaksson, development engineer at Boliden.
In 2007, Boliden decided to invest in developing the new ventilation system and chose ABB as its partner. This time, they would substantially increase the precision in governing by needs. ABB’s 800xA automation system was selected as the platform, where all automation would be handled in one and the same control system environment. ABB’s static frequency changer was already being used from earlier.
This has resulted in one of the world’s most modern ventilation plants for subterranean work:
- The plant ensures that the air flow is automatically adapted to activities in the rock shelter in question.
- The fans are programmed to only operate in those rooms where an activity is in progress.
- On vehicles used in the mine, there are transmitters with unique identity numbers. When the transmitter starts, ventilation is increased according to a pre-programmed volume to the vehicles in the breaking room. This volume is calculated in accordance with Boliden’s norms.
- The fan operates for approx. 14 minutes after the last vehicle has left the room in order to vent residual exhaust gases.