Hi, If you go to the REY thread at Hotcopper, Ann 615386 29/11/10 you will read that Rey are using a Highwall mining method as the coal seam at P1 Duchess Paradise Project, extends throughout the region at a depth of 1m to 1.5m only.
The deeper coal at P2 is not known to cover Mudjalla. Where do you get this enormous depth of coal at 10m to 15.8m from ???