Meitan xuebao (Jul 2023)
Coal mining technology with net zero carbon emission
Abstract
Based on the analysis of the big trends for energy revolution and global green development, the concept of coal mining technology with net zero carbon emission (abbreviated as ZCMining) is proposed and the conceptual framework and development strategies for ZCMining are also put forward. The basic principles for ZCMining are mass and energy conservation and earth’s carbon cycle. The near-zero emission of carbon dioxide during coal mining can be achieved through the collaborative optimization of energy sources, electrical network, electrical loads and energy storage by the consumption of clean energy. The other measures for ZCMining include the geological storage of carbon dioxide, and the improvement of ecosystem carbon sink. Based on distributed energy, the underground coal mine and open-pit coal mine use virtual power plant technology to integrate the internal resources of the mining area, optimize the load and storage of the source network, build a comprehensive energy system in the mining area, smooth the random fluctuation of renewable energy power, make the coupling between different energy forms closer, and provide guarantee for the multi-level application of energy and the reasonable allocation of energy. Among all measures for ZCM, the utilization of clean energy is one of the fundamental way. The geological sequestration of carbon dioxide includes sealed storage, mineralized storage and adsorption storage. Coal mines can make full use of the underground space formed by coal mining, rock fissures and deep non-minable coal seams to store carbon dioxide from coal fired power plants adjacent to the coal mine. At the same time, multiple effects such as the storage of carbon dioxide, the disposal of solid waste and the reduction of subsidence can be achieved. The CO2 geological sequestration is an important means to achieve zero-carbon mining. Improving the carbon sink of ecosystem includes strengthening the land use planning, improving the land planting and utilization rate, optimizing plants, improving the reclaimed soil, etc. The soil and plant carbon sink is a necessary supplement to achieve a zero carbon mining.
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