Abstract: In order to meet the project demands of controlling mine water flooding with high pressure and rein-forcement, a new high performance grouting material has been researched. Firstly, according to the factors affecting the strength of grouting material test results, a kind of optimized grouting material ratio is designed. Secondly, a series of indoor tests are developed by the improved consolidation apparatus, including grouting material expansion force, expansion ratio and unconfined condition stress strain relationship test, as well as the permeability test. Combined with the test results, the feasibility of the new grouting material to modify and reinforce roadway surrounding rock is analyzed. Finally, combined with the industrial experiment, the practicability and superiority of high performance grouting material in roadway surrounding rock reinforcing and modifying are further verified. Test results show that the new grouting material can well meet the requirements such as anti-seepage, water-proof, dynamic pressure and deformation, which could offer effective method to the enforcement of the strengthening technology of backfilling for soft rock tunnel and grouting for surrounding rock in condition that a mine is with a wet surrounding rock mass.

Key words: high performance, grouting material, mechanical characteristics, surrounding rock, industrial test