I visited this uranium mine in the Polish Sudetes in 2005; there is a short tourist route along one of the rehabilitated adits that opened in 2002. The guide, very much a product of the Communist era, was mega fussy about us observing rules and regulations - no use of video cameras allowed!
From what I understand, the mine was found, developed and funded by the Soviets after an agreement between the Soviet Union and Poland in 1948. The workings were fairly extensive and mined ore was taken to Russia for processing. The mine was worked using forced labour from Polish prisioner labour camps, some soldiers and a few skilled and well-paid miners.
Conditions were particularly bad, with no precautions against exposure to radiation undertaken. Due to the lack of basic protective equipment such as masks, many people fell ill with black lung. Not surprisingly statistics on illnesses and accidents were not kept, but it is anticipated that human cases of radiation sickness were many 😞
I doubt anyone will ever be able to accurately provide proof of deaths from cancer etc., caused by working in this and other uranium mines behind the Iron Curtain.
Den heb davaz a gollaz i dir