KIEV, Dec. 21 - Ukraine’s biggest producer of coking coal, the Zasiadko mine, completed flooding with a section that had been damaged by a series of powerful methane gas explosions a month ago, a source in the emergency situations ministry said Friday.

A total of about 945,000 cubic meters of water was pumped into the deep underground section to extinguish a fire that had been raging since the explosions, the source said.