Abstract: To improve and evaluate the effect of grouting,and to study and predict the pervasion law of grouts in space fracture network of rock mass,a seepage model for the Binghamian grouts flowing in space fracture network was put forward combining with the flow formula of Binghamian grouts in single smooth and inclined fracture.On the basis of the model,the grouting was real-timely simulated.In addition,the deformation of fractures and its effect upon grouting were studied during the process of grouting.It was indicatd that the grouting effect could be predicted and improred by the present model.