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Mine rescue teams re-entered the mine and successfully completed the recovery/re-ventilation phase to No. 9 Crosscut of the D Northeast Mains. The Main Fan was restarted during this period. Because of the significant methane/carbon dioxide liberation, a horizontal in-mine degasification system was installed to remove the gases from the sealed area. The vertical gob degasification system was also used. Monitoring locations were re-established farther in the mine.