Enhanced mine filling material and preparation method thereof

The invention relates to the field of cement-based construction materials, in particular to an enhanced mine filling material and a preparation method thereof. The micro-nano quartz powder and the titanium-loaded micron SAP are added into the mine filling material to improve the mechanical property of the filling material, and the micro-nano quartz powder has certain activity and can promote hydration of cement and play a micro-filling effect, so that the porosity of the filling material is reduced, and the pore structure of the filling material is improved; the titanium-loaded micron SAP is added for internal curing, the internal humidity of the filling material is kept, hydration of cement is promoted, the tensile strength of the titanium-loaded micron SAP is enhanced, then the mechanical property and crack resistance of the mine filling material are improved, mineral powder with the coarse particle size is prepared through grinding of the slag, the partial pozzolanic effect can be exerted, and the filling