The present report provides a comprehensive overview of the RFCS objectives and the COALHERITAGE necessity. A catalogue of Horizon, RFCS and RFCS-AM projects, focusing on the preparation for just transition, challenges, and opportunities, has been curated, showcasing noteworthy outcomes. A literature review is conducted to enhance knowledge about coal mine closure, repurposing, and the Just Transition, emphasizing the unique aspects brought forth by COALHERITAGE. The analysis of primary challenges highlights the novelty inherent in the COALHERITAGE approach.