Optimization of the Operation of a Mine Integrated Energy System Based on Waste-mining Coupling and Hybrid Energy Storage

Driven by the dual-carbon goals, the mining energy system urgently needs to transition to low-carbon, high-efficiency operation. To address the spatio-temporal energy mismatch between abandoned and active mines, this study proposes an optimized scheduling model for mine integrated energy systems. Firstly, by comprehensively considering the utilization of mining area-associated energy sources, including coalbed methane, mine exhaust air, and mine water inflow, a multi-energy flow network is constructed, which integrates compressed air energy storage and hydrogen storage systems in abandoned mines, combined heat and power generation and organic Rankine cycle units. Additionally a coordinated electricity-heat-cooling-gas-hydrogen supply topology is established. Secondly, an optimal scheduling model that minimizes total cost while prioritizing low-carbon operation is proposed, which comprehensively considers tiered carbon trading costs, equipment operation and maintenance costs, renewable energy curtailment penalties, and external energy procurement costs. Finally, taking a typical mining area in Shanxi Province as a case study, simulation results demonstrate that this model significantly enhances renewable energy consumption and achieves synergistic low-carbon and economic operation.