COVER STORY target . The truck assignment problem in mining operation has been dealt with most as an assignment problem or sometimes as a transportation problem . three sub-problems : ( 1 ) shortest path model , ( 2 ) truck-and-shovel allocation optimisation – upper stage and ( 3 ) realtime truck assignment optimisation – dispatching – lower stage . The best path model determines the shortest route for travelling between every pair of locations in the mine . The truck-and-shovel allocation optimisation allocates haulage resources to excavating activities based on truck-dependent loading rates and maximisation of overall truck productivity .
A static scheduling algorithm is implemented to determine the optimal configuration of loaders over the mining faces as well as optimum production rates for each route connecting loading points to dumping points and allocation of truck resources to meet production
This programming algorithm assigns the trucks to a proper destination by the time the truck asks for a destination at an assignment beacon in a way that minimises the deviation from the production target .
The fleet management system mainly works based on two different set-ups : ( 1 ) fixed truck allocation and ( 2 ) flexible truck allocation . In fixed truck allocation , at the beginning of each shift , a group of trucks is locked to each transportation route . The trucks allocated to the paths are to work on the same path over the shift period based on several criteria , such as production requirement , availability of the trucks in the fleet , etc . The paths to which trucks have been allocated will not change until a shovel breaks down or a critical event happens .
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