Tunnel fires.

Due to the confined space and the chimney effect that will occur when a tunnel fire will develop a strong and a continuous flow of air will feed the fire with oxygen.
Fireblocker's method gives a possible solution of how to stop the flow of air in a first stage of a tunnel fire and reduce the area where the fire can develop.

Due to the fact that we are dealing with a fire inside a tunnel with known dimensions gives us opportunities to organise the fire fighting in a well prearranged way. However this doesn’t mean that we will have all parameters in hand while fighting the fire.

Fire fighting in tunnels is difficult

The transportation of different types of goods through tunnels (sometimes even explosive goods are transported) can make it difficult to provide a simple structure of organisation to fight the fire.