The Arch-Lock construction system works similarly to LEGO with its interlocking bricks that can be assembled without additional supports. A video by Lock Block Ltd., the company behind Arch-Lock, shows their bricks in use with a Zipper truck system to quickly create a tunnel.
In addition to ease-of-use, the bricks can also be quickly disassembled and reused in other projects.
This video shows the versatility of the Zipper truck system. We are able to create tunnels with openings very quickly with no permanent support work. This arch can be used as a mining reclaim tunnel or storage vault with top access.