The topics of the IOC 2021 are related, but not limited to:

geologyunderground miningsurface mining
mineral processingextractive metallurgymetal processing
materials scienceinorganic technologychemical engineering
environmental engineeringindustrial engineeringrecycling technologies
energeticsmanufacturing  technologiesquality  management
software engineeringmechanical engineeringdesign and construction
and other related fields