Start of tunnelling
Drifting will start on 15 March 2021. As the conveyor belt has not yet been completed at that time, the material will initially be chucked using buckets, hoisted up with the tower crane and then removed from the platform using roll-off troughs.
First, the north logistics cavern is excavated to make room for the fixed installations (transformers, dust extractors, escape containers, etc.) in the underground area. Once the north logistics cavern has been excavated, the Marti team begins with the parament tunnels of the north cavern and the south logistics cavern. For space reasons, the logistics cavern is excavated with an excavator, the parament tunnels with a smaller roadheader and the actual caverns with two large roadheader machines.