High density washable mining grouting reinforcement material and preparation method thereof

A method for preparing a mining grouting reinforcement material, comprising:

• mixing an amino acid salt with a sodium silicate solution uniformly to obtain a component A;
• mixing part of a plasticizer with a filler uniformly to obtain an admixture, then adding a molecular bridging agent into the admixture, and mixing the molecular bridging agent and the admixture uniformly under a condition of sealing and first stirring to obtain a first mixture;
• adding a rest of the plasticizer into the first mixture to obtain a second mixture;
• adding an isocyanate into the second mixture under a condition of second stirring, followed by standing and storing in a sealed manner to obtain a component B;
• wherein a specific gravity of the filler is 2 to 8;
• wherein the amino acid salt comprises at least one of amino acid salts containing all groups —COOH, —NH2 and —COOR, where R is a metal ion.