Eieio
Apparently it isn't an issue ... the Kingaroy coals are inundated with goundwater too ... perhaps someone like Factfinder or DrP could confirm, but I recall that a ucg burn is supposed to occur within a "bubble" created within an inundated coal seam ... and that the burn is maintained/controlled by the injection of hot air (like from this thread lol) and steam.
Cheers
Dex
