Fracturing Grouting Of Rock Mass With A Single Fissure Connecting To The Grouting Hole

When the preexisting fissure connects with the grouting hole, the process of fracturing grouting of rock mass is studied by using the Realistic Failure Process Analysis 2D-Flow, The results show that the process can be divided into 4 stages: stress concentration, fracturing and expanding on the top of the preexisting fissure, fracturing and expanding along the growing hole, and continuous fracturing. The initial fracture pressure increases with the increase of the angle at which the preexisting fissure and the direction of large boundary stress meet, but decreases with the increase of the ratio of the large boundary stress to the small boundary stress.