This article examines how five innovative technologies can transform abandoned or in-use coal mines into sustainable energy centres. From solar thermal to compressed air energy storage, these solutions offer a path to a more sustainable future while addressing the decline in coal production., Energies, 2023) To have a functional power grid. . Pumped Storage Hydropower (PSH) provides over 90% of the nation's grid-scale energy storage, playing a critical role in balancing electricity supply and demand. However, traditional PSH facilities require specific geographic conditions, such as large elevation diferences and access to significant. . Many coal mines are being abandoned for economic and environmental reasons in China.
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