Rapid setting cement-based grouts are widely used in water rich fracture grouting engineering. In order to study the defusing mechanism in fracture and pressure characteristic of rapid setting cement-based grouts

single planet fracture grouting model text under hydrostatic conditions were carried out using cement-silicate grout and polymer modified grout with different proportions. The diffusing behavior and the pressure variations in different measuring points were recorded to study the laws of hydrostatic diffusion of rapid setting cement-based grouts and the pressure distribution of grout diffusion. Results show that cement-silicate grout and polymer modified grout are similar in diffusing behavior and variation of pressure distribution

while the diffusing pressure of the cement-silicate grout is obviously higher than cement-silicate grout polymer modified grout

which has a relatively longer condensate and solidifying time and is conducive to improving the diffusing distance. The results are used in Zhangmatun iron mine with success in governing the water leakage in rock fracture and stability of the surrounding rock

which has a certain theoretical and practical significance and offers an reference for similar projects.