Performance Analysis and Application Practice of Grouting and Water Shut-off Material in Goaf
Effective management of the water inflow at the working face is of great significance to safe production.Taking A Mine as a test mine,a new water blocking material was developed and applied in engineering.The research results show that the shortest setting time can reach 45 s,the compressive strength gradually decreases with the increase of the water-cement ratio,the maximum can reach 16 MPa,the grout bleeding rate is less than 5%;the particle loss rate of the rock sample is the maximum 0.6%,and the minimum is 0.2%,the material has good dispersion resistance,and the fissure filling area can be well cemented together;after the goaf is grouted and water blocked,safe mining is realized.
goafgrouting to block waternew sealing materialsmaterial properties