Abstract: An analysis was conducted for the technical scheme of non-coal pillar mining under the geological conditions of thick hard roof in Sima mine.After exploration of the geological conditions of operational site, geological zoning was carried out, and targeted schemes of constant resistance large-deformed anchor cable support, multi-zone blasting pre-fracture and gangue-blocking support were designed, forming a complete set of non-coal pillar mining technology under thick hard roof.The reliability of the application of the scheme has been demonstrated through underground industrial testing and monitoring, and has a strong guiding value for the efficient and safe mining of coal under similar geological conditions.