You are in: Home > Didatic Tour >Look the tour
The techniques of excavation in history
The excavation during the Roman
During the Roman era, and at least until 1700, the mining activity was exclusively manual.
To detach from the mountain marble relying solely on the force of arms of the workers, because there was no machinery They could come to their aid: used only wooden wedges planted with the tip and hammer in crevices where Marble was more cedevole.
The excavation in XVIII century
Around 1700 began the first half of escavazioni for 'explosive , which was introduced in holes in the marble products With a rod with a chisel tip forged. This technique and call "launched" , and to break down while allowing large quantities Rock quickly, had the bulk defect to destroy much of the marble escavabile and produce a wide variety of waste.
The excavation in XVIX century
Towards the late 800's in the quarries of our territory was introduced a new technique: the twisted wire , which moved amotor allowed to cut marble from the mountain.
The helical wire diameter was approximately 5 mm in size was made by a twisted form of three small steel cables With the characteristic sense of change of screwing every 50 meters, so that the cutting of marble happen right. This wire was a length of about 1000 meters, passed on the marble be cut and with a mixture of water and abrasive silica sand cut marble. It was not however the wire to cut the rock, its only function was to carry in the wake twisted the mixture of water and Silica sand.
Helical Wire
There was a visible change landscape: the mountain was not destroyed more Leaving piles of rubble, but literally cut, engraved with precision.
In the early 80s there was a great innovation: the use of diamond wire cutting machine.
Unlike what happened to the wire twisted, cutting is now running the diamond dust without having to resort to the use of silica sand. To detach easily from the mountain by the bank cut diamond wire fit Pillow metal which pump water at high pressure, inflating the cushions themselves move the material from the mountain so that enough so that with the help of hydraulic jacks and excavators we can proceed to the turnover.
Back