Zasyadko Mine

Zasyadko Mine (Ukrainian: Шахта ім. Засядька, Russian: Шахта им. А. Ф. Засядько) is a coal mining company in Ukraine's eastern city of Donetsk. Following the start of the War in Donbass in 2014 the mine became situated in rebel controlled territory. The manager and alleged owner of the company is Yukhym Zvyahilsky, influential businessman and politician within the Party of Regions. Along with its economic, technological and political importance, the company, namely its coal mine, is infamous for being the site of repeated mining accidents with numerous fatalities. The deadliest disaster, the worst in Ukraine’s history, happened on November 18, 2007, killing 101 miners.
Source: https://en.wikipedia.org/wiki/Zasyadko_coal_mine