Dukla mine (Czech: Důl Dukla) is a closed coal mine located in Dolní Suchá near the city of Havířov in the Czech Republic.
It was triggered by a miner who accidentally started a conveyor belt and did not notice it.
The conveyor belt was working idle and eventually thanks to friction the rubber band of it caught fire.
Only around 17:00 the fire was fully detected and dealt with by the mine supervisor.
[4] After the tragedy, all local mines switched to fire-proof belts in conveyors (in addition to other changes made).