The GAG at Pike River coal mine was re-started about 3.30pm today after being shut down overnight for maintenance.
During the shutdown period gas readings at the mine prompted the evacuation of five contractors who were working near the portal shotcreteing cracks in the seal.
It will take several hours to re-pressurise the mine.
The Floxal continues to pump nitrogen into the mine which is hoped will cool the atmosphere inside.
ends