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World record for Sauda Hydropower project in Norway

Sauda Hydropower project in Norway, under construction by contractor AF Scandinavia for owner Elkem Saudefaldene, has set a new world record for weekly advance on a single face with their Atlas Copco Rocket Boomer XL3 drill rig. 

In week 21, 2007 AF Scandinavia excavated 165 m of tunnel between Monday 21st May and Saturday 26th May, drilling and blasting 33 rounds in the 38 sq m section with an average time of less than 4 hours between each blast. 

Two shift teams took part in the record drive, working 06:00h to 02:00h, plus some overtime. Rock condition was good quality granite, without any need for shotcreting, requiring only 3 m-long rock bolts for support, 199 units of which were installed. 
Blasting agent was Orica bulk emulsion Titan 7000 slurry explosive and a low emission Volvo L220 loader equipped with side dump bucket shifted the muck. AF Scandinavia is part of AF Gruppen which has 1,800 employees and is one of Norway’s largest contractors. 

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