Simulating and Optimizing of Logistics System in Strip Mines

摘要

Most of strip mines belong to capital and energyintensive industries, So it can promote mineproducing safety, improve economic benefits and achieve mine sustainable development through carrying out the simulation and optimization research of logistics system, optimizing the system resources allocation and constituting reasonable production plan and resource scheduling in this industries. The logistics system of strip mines is a representative discrete-event system, so the data of facilities and resource parameter are collected and extracted in order to gain the statistical probability for discrete simulation by Expertfit-an data analysis software; Those optimization schemes, including transportation network, the layout of factory and dispatching plan, are chosen by discrete event systeM theory and operations research, which can minimize the cost and optimize material composition; Based on the Flexsim plat. Then 3D mathematic and simulation model is set up, embodying the relation between transport, resource and facilities, which thereby simulates, analyses and optimizes the pro-ducingtransport system of strip mines vividly. It puts forward two dispatching method, Grade-threshold dispatching and passive dispatched truck, and set three indexes in orthogonal designs, including truck utilization ratio, producing-facility utilization ratio and the standard deviation of Aluminum to Silicon ratio (A/S). By analyzing the data of simulation, it gains the optimization decision-making of temporary reserves in washing bauxite site, numbers of trucks and ways of dispatching, meanwhile, forecasts and analyzes latency influence factors and sensitivity. The results validate the rationality and correctness of simulation system.