| An underground mine network presents many similarities with a plant network: unidirectional or bi-directional path segments, single vehicle segments, queues at servers, etc. But underground mines also present additional peculiarities: space limitation around servers limits the length of queues; LHDs can travel forward or in reverse thus giving more analysis flexibility.; This work is on optimal management system for a fleet of automated LHD (Load-Haul-Dump) vehicles that is able to take dispatching decisions according to objectives established by the planning crew, as well as routing and scheduling decisions to control vehicles along their paths, thus rendering these decisions closer to underground reality. All decisions must be taken in real-time. The decision model is resolved using an acyclic shortest path problem on an large discretised network.; The system takes assignment decisions (dispatching, routing and scheduling) in real time whenever a vehicle asks for a new destination. Various decisions criteria are being analyzed within this algorithm. The decision system handles front-vs-end loader considerations on a network using bi-directional edges. (Abstract shortened by UMI.)... |
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