Simulation Research For Reliability In Uranium Mine Transportation And Elevation System Based On Multi-Agent

As a nuclear reactor fuel, uranium is one of the main raw materials of nuclearpower. With the world energy crisis and the development of country, uranium minewill certainly be as so large as mining. The increasing scale of mining will directly ledto the complication of mine production system, which makes it more difficult toanalyze the reliability of the production system. In uranium mining, the premise thatmine production system can run well is to have a good transportation and elevationsystem, which can directly affect the mining production scale and economic benefits.Therefore, according to the characteristics of the underground uranium mineproduction system, multi-agent technology was applied to build reliability model ofunderground uranium mine transportation and winding system to achieve itsreliability simulation.Multi-Agent modeling theory has independence, distributed autonomy andcompromise, which also has the self-ability of construction, learning and reasoning.So, the theory of Multi-Agent model was used to build and improve the transportationand elevation system. Firstly, Multi-Agent technology was applied to build theintelligent structure of underground mine. The underground uranium mine productionsystem was divided into master Agent, transportation Agent, elevation Agent andventilation Agent. Then, the reliability theory and Stateflow technology was appliedto construct single agent and the communication mechanism between them. In Matlabsoftware, a simulation method for reliability in production system was achieved bysimulink.(1) In order to achieve reliability simulation of uranium mine transportation andwinding system, a reliability simulation model had been constructed by Multi-Agentmethod. The model was built by a bottom-up way. Each device was considered as asingle equipment Agent. Transportation, winding and ventilation were made up bythese Agents. (2) The work unit of Agent model was designed. According to the approach totask-oriented decomposition, the whole underground mining production system couldbe classified into ventilation subsystem, transportation subsystem and shaft windingsubsystem. Each subsystem was composed of different functional equipment, such astransportation subsystem, which was consisted of chute, ore-drawing machine,harvesters, electric locomotive and so on. Therefore, the "bottom-up" model wasadopted, which made the system modeling process simplified and also improve itsreusability.(3) The running process of reliability simulation model for production systemwas designed. Ventilation subsystem, transportation subsystem and windingsubsystem were in series in physics, but the reliability of their relationship was notsimple series. When system failure occured, the whole system would not be affectedif it could be back to normal in a certain time. So they could be seen as a series offlexible system. The system could be decomposed by the way of "bottom-up" model.Finally, the logic relationship of reliability for the three subsystems was realized bythe master agent.Through the simulation analysis, the reliability simulation model of uraniummine transportation and winding system was more consistent with the actual situation,and the reliability of the simulation results are more reasonable, which could providesome references for mine production planning and maintenance plan. Due toStateflow simulation modeling technology used, the workload of simulation modewas greatly reduced, then changes for model in the subsequent simulation alsobecame more easier.