Abstract: Guangxi Beishan Ore suffered from water gushing when tunneling in 0 meter level.In order to prevent water flowing into tunnel from three direction，semi enclosed grouting method was applied to plug water gushing.Due to the highly irregular fault fracture，the rates of gushing water from drilling hole are different greatly.In order to ensure the grouting effect，different formula of cement-silicate slurry was adopted for fractures with different rate of gushing water.The flow of water in the borehole is used to estimate the amount of grouting in this fracture，in order to optimize the parameters of grouting and grouting construction technique.Finally，the effect of grouting is analyzed by the method of check-up hole method and grouting quantity distribution feature method.The results are consistent with the actual results after excavation.Anyway，grouting construction method in Guangxi Beishan mine is good with small project amount and fast construction progress，which is worth applying to the similar projects.

Key words: Fault fracture, Water gushing treatment, Cement-silicate, Grouting parameter optimization, Grouting effect evaluation