Nano-modified all-solid-waste mine filling material as well as preparation method and application thereof

The invention relates to the technical field of industrial solid waste resource utilization, in particular to a nano-modified full-solid-waste mine filling material and a preparation method and application thereof, aiming at mine filling, solid wastes such as nickel slag and fly ash and sodium carbonate are innovatively adopted as weak base excitants, the full-solid-waste rapid curing material is realized, sintering is not needed, the cost is reduced, and the material is environment-friendly and energy-saving. The environmental protection property is improved. Through component optimization and nano material (silicon dioxide and titanium dioxide) enhancement, the material shows rapid initial and final setting (12 minutes per 23 minutes), high early strength (greater than or equal to 5.0 MPa in 2 hours) and excellent mechanical properties (40 MPa in 28 days), and has good constructability and low shrinkage characteristics. The alkali-activated concrete technology not only promotes the progress of the mine fill