Unearthed Sydney 201726 Aug - 30 Aug
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Carryback Detection - Detect the presence of carryback in a truck that should be empty
Sticky dirt stuck in the back of the truck after tipping, when the truck should be empty, causes productivity inefficiency. Carryback is an unwanted waste of capacity in the business.
The Load/Haul/Dump (LHD) process involves material being dug from the mine working face, loaded into a truck which transports the material to either a dump (for waste) or a crusher (for ore) where it is dumped.
After dumping, the empty truck returns to the digger. If material remains in the truck this is carryback and will reduce the capacity to load new material.
There may be multiple diggers, ore stockpiles and crushers making for a multiplicity of routes. Each route may include changes in elevation.
The payload measurement system uses a measurement from each strut. It does provide a good measurement of carryback, however due to various priorities these are not always operational or well calibrated. The operational data warehouse collects data from the mine dispatch systems
The fleet asset health systems collect engine and operational data from the mobile fleet which is stored in a central repository for maintenance data.
There is a weighscale which is only occasionally used as this diverts the truck from the normal operational routes
Potential Areas to consider
There are any number of different technologies or solution methodologies that may be available for carryback detection, however it should be noted that:
Truck sensors may be inaccurate or not well maintained
Frequency of detection requirements is once or twice per ‘empty’ trip
An algorithmic approach may be suitable
A number of different parameters are collected from each truck on various time scales.