Borås is blasting 2 million cubic metres of rock
Vibration secured for the press
Viared is strategically located next to the motorway, but at the same time, there are both workplaces and homes nearby to take into consideration.
”The local newspaper, Borås Tidning, is east of the blasting site,” explains Miikka Kortelainen. ”It’s perhaps the most sensitive business. Printing presses and vibrations don’t go well together, which is why we chose to be extra cautious and double the inventory and risk area to not disrupt the news flow.”
After the extensive risk analysis, work continued with vibration measurements during blasting. Here is where AvaNet Vibration comes to full use.
”Here, the blasting engineer can enter the rounds into AvaNet on his or her own,” says Miikka Kortelainen. ”Then, based on the coordinates of the round and the measurement point, the current limits are calculated automatically. This distance correction is a major advantage in the work. Our customers can also log in and see everything in real time and also do some of the work themselves.”
Several different sensors are used together with the AvaTrace M60 field instrument in the measurements at Viared. Vertical, horizontal and triaxial geophones, as well as accelerometers and air shock microphones, have been placed out to register data.
”The extended operating time is important for us,” says Miikka Kortelainen. ”The field instruments require very little manual supervision, saving us a great deal of time. Another advantage is that they run on regular batteries and still provides a very long battery life up to 5 months”.