At Ravensworth Surface Operations, coal is hauled from the mining areas to the ROM pad and dump hopper via internal coal haul roads. The coal is crushed by rotary sizers before being transported by parallel conveyor belt systems to either the Ravensworth Coal Handling Preparation Plant for export, or to the Bayswater and Liddell Power stations for domestic power generation.
Ravensworth North produces thermal and semi-soft
coking coal with a majority of coal supplying
the export markets and some domestic. The thermal coal product is highly
volatile with strong combustion characteristics and has been widely used for
power generation as well as for general industrial use. Semi-soft coking coal
produced by Ravensworth North is used by steelmaking blast furnaces as a
component in the coke blend. The semisoft coal is low in ash and sulphur with
attractive coking properties.
Coal is extracted from eight seam groups. In stratigraphical order, those seams are the Broonies (BR1-10), the Bayswater (BAY1-2), the Upper Lemingtons (ULM1-9), the Lower Lemingtons (LLM1-12), the Pikes Gully (UPG1-5 and the LPG), the Arties (UAR1-4 and LAR1-2), the Liddell (ULD1-4, MLD1-2 and LLD1-3 and the Barrett (BAR1-8).The seams are divided into defined plies commonly separated by mudstone and to a lesser extent sandstone. The seams generally dip south-west at 1 in 35. The prime overburden to coal ratio averages 5.8:1.
|Ravensworth North Mine Average Export Coal Content||< 9% ||<13.5%||< .7% ||> 29 MJ/kg|
|Ravensworth North Mine Average Domestic Coal Content||< 9% ||< 32%||< .5% ||> 21 MJ/kg|