The Roy Hill Mine has an initial mine life of 17 years, with a likely extension beyond that of 12 years. Roy Hill is an owner operator, conventional open pit, drill and blast, truck and excavator bulk mining operation.
Over the initial 18 year life of the High Grade Project, 4,957Mt (dry) of material will be moved. This equates to an average yearly mining rate of 270Mtpa (dry), to produce approximately 69Mtpa (wet) of Run-of-Mine (ROM) ore feed for the processing plant. This makes Roy Hill one of the largest mining operations in the Pilbara.
The Roy Hill Mine has an average strip ratio of just under four tonnes of waste and low grade mineralisation to each tonne of ore. A quasi strip mining approach is utilised where the bulk of the overburden and waste is dumped back into the previously mined out pit voids. This process helps minimise haulage distances for waste rock, as well as the footprint of mining activities.
Waste dumps are progressively rehabilitated over the life of the mine, to ensure that mined areas are rehabilitated to their natural state as quickly as possible.
Multiple pits are in production at any one time, with each pit being broad and relatively shallow in nature, with the deepest pit prescribed in the life of mine plan being less than 110 metres in height.
ROM pads and crusher stations are located in close proximity to each pit with the crushed ore then conveyed to the processing plant. Three crushing stations are in operation at any one time, which provides operational flexibility. Large ROM stockpiles ensure suitable material is available for the processing plant at all times.
A detailed dewatering strategy and water management plan has been developed.
This ensures dry mining can occur and the necessary water is available for the processing plant.