Wujek Coal Mine

Wujek 'Coal Mine is a coal mine in Katowice, Poland. It is widely known in Poland as the place of the massacre of striking miners in 1981, as well as being the site of a deadly mining accident in 2009.
Mining operations began in the vicinity as early as the 16th century. The present mine, Oheim, was established in 1899 by a merger of six mining operations existing in Silesia. The peak Polish production was in 1979.
Currently, the Wujek mine produces sub-bituminous coal with a typical energy content of 30000-35000 kJ/kg, volatile content of 30-31%, ash content of less than 5%, and sulfur content of less than 0.6%.
On 1 April 2017, the Wujek mine was taken over by Polska Grupa Górnicza, and in 2021, it was connected to the Murcki-Staszic Coal Mine via an underground passageway. Since then, both formerly independent mines are now operated as a single entity called Staszic-Wujek Coal Mine'.
The name "Wujek" means "Uncle" in Polish.