Abstract:
In this paper, based on the present situation of broken surrounding rock grouting construction in Jinmei Group, and through analyzing and researching the existing grouting materials, a new type of using double fluid rapid hardening material to reinforce crushed surrounding rock is developed. And according to the study of partition of broken surrounding rock features and the present stage grouting process and parameters, and the method of using forward level grouting to solve the problem of running slurry, slurry leakage of inorganic grouting material is proposed, meanwhile, the grouting effect of ordinary grouting materials in industrial test is compared. Results show that the seepage area and directional seepage area are the key areas of broken surrounding rock grouting, and the seepage blocking area and the original rock seepage area are given priority to slurry seepage; this grouting material initial setting time is 3 to 5 min, final setting time is 8 to 10 min, and uniaxial compressive strength of 2 hours can reach 16 MPa. The field test found that this material can effectively solve the problem of broken surrounding rock, and the grouting effect is better than common grouting material.