Abstract: To explore the way of rational utilization of soda residue,soda residue and fly ash were mixed according to certain ratio.And sodium silicate was mixed to prepare a kind of grouting slurry, used in curtain grouting engineering of mine.Nine groups of orthogonal test and the scope of soda residue sieving test were designed to analyses influencing factors.Results show that the concentration of sodium silicate has the most prominent influence on compressive strength, fluidity and final setting time, and the ratio of soda residue and fly ash has the most prominent influence on the stone rate within the scope of selected factor levels.The compressive strength is basically equal when soda residue is sieved less than 2 mm or 1 mm.The compressive strength is enhanced about 51% when soda residue is sieved less than 0.5 mm.The compressive strength is enhanced about five times when soda residue is sieved less then 0.25 mm.

Key words: grouting slurry;soda residue;orthogonal test;influencing factor;mine curtain