Mine waste is both an escalating environmental and geotechnical risk and a strategic secondary resource. Across billions of tonnes stored in tailings storage facilities (TSFs) and waste-rock dumps (WRDs), as well as other post-mining residues, stability concerns and impacts on water and air quality coexist with recoverable critical raw materials (CRMs). This session brings together researchers, industry, and authorities to advance multi-scale Earth observation (EO) and data-integration workflows for characterisation, operational monitoring, and valorization of mine waste. We welcome contributions spanning different spatial and temporal scales that leverage satellites (optical, hyperspectral, thermal, SAR) and UAVs (photogrammetry, hyperspectral, geophysics), alongside near-surface geophysics and in-situ sensors, addressing a diversity of waste origins (sulfidic, coal and lignite, industrial by-products, legacy sites, active operations).

Key topics of interest include:
(i) Geotechnical aims: stability and deformation monitoring, erosion modelling, water balance, and moisture mapping.
(ii) Environmental aims: water pollution/acid mine drainage, dust and aerosols, vegetation health monitoring, and ecosystem recovery.
(iii) Valorisation aims: re-mining/re-processing case studies that link EO-derived composition/proxies to processing options for secondary CRM recovery.

We particularly encourage interdisciplinary contributions that combine Earth observation with advances in artificial intelligence, database development, and frameworks for circular economy and energy transition. By linking technical monitoring with societal, economic, and policy perspectives, the session aims to advance holistic approaches for managing risks and unlocking the resource potential of mine waste.