3 ms·Most tunnels in Norway are bored through, and I doubt we have any softer rock here.by varjag 9y agoMost tunnels in Norway are bored through, and I doubt we have any softer rock here.digi_owl 9y agoYou sure about that? Most i have experienced along the coast have been been done using explosives.varjag 9y agoDoubt it's any of the bigger ones (longer than couple hundred meters), or done in the last three decades.