An inflatable plug made of heat-resistant materials can be used to quickly close off an underground mine section or a tunnel. A special product of Liberty Gasturbine Holland is an inflatable tunnel plug with which a tunnel entrance or exit can be closed in just a few minutes.
In principle, one or more plug(s) are available for each tunnel, whereby it is possible to install them permanently in the tunnel. In the event of a calamity, for example, all you need to do is press a button to close the tunnel. All shapes are available.