Spatial Distribution Characteristics of Plastic Failure and Grouting Diffusion within Deep Roadway Surrounding Rock under Three-Dimensional Unequal Ground Stress and Its Application

To explore the bolt-grouting method of deep roadway under three-dimensional unequal ground stress, a unidirectional coupling model surrounding rock plastic failure and grouting diffusion considering influence excavation disturbance stress was established. Spatial evolution characteristics diffusion, impact spacing row bolts/cables on grout were simulated by using numerical method. The results revealed that horizontal perpendicular to axial direction main factor inducing damage. Moreover, more significant difference in three directions, larger zone roof corner floor roadway. Under different lateral pressure coefficients, diffused can be approximate ellipsoid cylinders. Furthermore, ratio coefficients parallel roadway, length each spatial rock. In support, should greater than rock, optimal relationship between their is determined. research applied engineering for three-level Haizi Coal Mine, good support effect achieved. This provide technical guidance reference design parameter optimization roadways high stress.