全链条视角下疆煤外运通道新增与货流分配联合优化OA

To address the new corridor development at the strategic level and the freight flow allocation at the operational level in the coal transportation network,a joint optimization method for both aspects was proposed.A mixed-integer linear programming(MILP)model was developed to minimize the total cost,accommodating the end-to-end transportation needs from coal mines to power plants via railway trunk lines and incorporating multiple nodes such as coal mines and railway loading points.The model simultaneously determines railway corridor development and freight flow allocation schemes.Using real-world data from an energy group transporting coal from Xinjiang to power plants in Ningxia,the model was solved with Gurobi.Results demonstrate that the model effectively optimizes both corridor development and flow allocation while identifying the lowest-cost transportation routes.When the new corridor handles a relatively high share of the transportation volume,the fixed costs can be effectively spread,resulting in higher marginal benefits.Variations in railway transportation price influence flow allocation,optimal routes,and development plans,underscoring the necessity of joint optimization between corridor development and freight flow allocation.The research significance is to provide a quantitative decision-making framework including corridor selection,capacity allocation,and cost control for the"Xinjiang Coal Outward Transportation"strategy.