From 1979 through 1992 Zvyahilsky was a director of Zasyadko coal mine of the Industrial Union "Donetskugol".
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Coincidentally, in early 1990s Ukraine suffered from the miners' strikes that led to the early presidential elections in 1994.
The manager and alleged owner of the company is Yukhym Zvyahilsky, influential businessman and politician within the Party of Regions.