A Fantini rock saw can cut under and around the blocks of stone - in this case Portland Whitbed
Another image of the Fantini saw cutting block
This machine can install rock bolts to secure the ceiling - it takes around three minutes to put in a bolt. The machine drills the whole, injects a quick setting cement and then inserts and tightens the bolt. They install a bolt every three metres.
Another view of the rock bolting machine manoeuvring into place.
A few more Portland Stone mine pictures - cutting out the block with a Fantini saw and putting rock bolts in the mine ceiling, which is Purbeck Caps
#portlandstone #AlbionStone #IsleofPortland