In 1975 the German mining authorities implemented new safety requirements.
All underground steel cord conveyor belts had to be replaced within a specified time with self-extinguishing types as per DIN 22129.
The first conveyor belt of this type, a Phoenocord St 4000, was put into service in 1975 at the Goettelborn mine. Coordinates:
49°20'36.76"N 7°2'18.39"E |