We saw the roadways being prepared, how they look
after that and the different ways we can move in them. But one aspect has been left out
until now: The air has to be moved in the roadways, as well. How else can the air get to
the areas of a colliery being far away from the next shaft ? Unluckily it is not
enough to pump air into the colliery and wait whether it will find its way or
not, the air has to be lead. This happens with doors like the one in the
picture. They interrupt the natural flow of air and lead it into the areas it
would not reach otherwise.
In this picture additionally the infrastructure
in the roadways can be seen very well: On the left there is the conveyor, on the
left above the conveyor there is a huge pipe and some smaller ones leading e.g.
the methane gas to the shaft and then to the surface. On the right there are
some circuit lines, in the middle under the ceiling the rails for the mono-rail and the
space for the pedestrians - everything and everybody must pass through here !
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