Abstract:
Under the China's dual carbon targets, the green and low-carbon development of the coal industry has become an urgent need for China's energy revolution. It is an effective measure to eliminate the negative influence of water and heat hazards and actively stimulate and exert the potential positive effect of associated resources to realize sustainable green mining. Based on the characteristics of China's coal resources, an intensive coal-water-thermal synergistic mining mode is first proposed, and the connotation and basic synergy model are investigated. The integrated industrial chain of mining resources production, supply and storage is established by controlling, utilizing and storing the companion resources in the whole life cycle. By elaborating the key technologies and scientific issues such as the efficient and accurate drainage of top plate water, seasonal aquifer energy storage, the efficient extraction and cascade utilization of low-enthalpy thermal energy, the in-situ mining of deep geothermal heat and the deep geological storage of mine water, a life cycle coal-water-thermal co-mining technology system with low-carbon zero-carbon integration of coal mining as the core is proposed. In order to optimize the management of the system, the synergistic degree of optimized mining process and operation strategy is configured with the dual objectives of carbon emission and economy. Finally, taking the Xiaojihan Mine as an analysis case, based on genetic algorithm, the multi-objective allocation optimization model of mining resources is preliminarily constructed, and the efficiency of energy saving and emission reduction is evaluated. The results show that the annual energy saving rate can reach 50.2% by using the associated wind/water resources of the Xiaojihan Mine, and the total carbon dioxide emission of production energy can be reduced by 24.2%. By expanding the link replenishment role of associated resources in the comprehensive energy system to realize the positive conversion of mining negative effect, it has referential significance for the coal industry to help achieve the dual carbon targets.