The concept of non-destructive mining technology based on filling mining

In order to solve the space-time contradiction between mining and filling processes of most filling mining technologies, the existing problems of various filling mining technologies were discussed by comprehensively analyzing the application status of filling mining technologies in domestic coal mines. Based on this, combined with the self-designed independent and composite hydraulic support for mining and filling, the technical conception of non-destructive filling mining in coal mine was put forward. The technical ways of non-destructive filling mining were categorized to realize the near-zero damage of ecological environment, mining efficiency and working space in the process of coal mining. Based on the relevant results of the research team, an enhanced filling method suitable for non-destructive filling mining was proposed, and its process flow was refined, which can realize the accurate adaptation of the strength of the filling body to the difference of movement in different regions during the roof breaking process. Based on the above research, the future development direction of non-destructive backfill mining technology in coal mines is proposed, focusing on integrated technologies for lightweight and high-efficiency equipment, intelligent mining and filling equipment, and diversified utilization of gangue-based materials.