Aleksandr Abramov, a top manager of Russian steel maker Evraz, which owns the mine, said the shake-up would be "serious." He gave no further details.
The methane blast took place on May 24 at the Yubileynaya mine, near the city of Novokuznetsk. About 180 miners escaped, several with injuries.
An explosion in March at a neighboring mine owned by the same company killed more than 110 people. (Reuters)
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