Mesomechanics Behavior Analysis of Surrounding Rock Under Roadway Excavation Disturbance

To study the mesomechanics behavior of surrounding rock under excavation disturbance, the excavation model is established by using PFC software, and the distribution law of stress and displacement is analyzed. The results show that the local stress concentration easily arises near the two bottom corners of the chamber; for the small compressive stress near the two sides and top-bottom of the roadway, the tension failure is easily formed. And at the same time, the influence of the particles bonding strength on the sinkage of roadway roof is analyzed. The law of the sinkage is similar to the power function distribution; the surrounding rock bearing capacity can be improved by increasing the compressive strength of the surrounding rock, then the deformation of surrounding rock can be reduced. So, in engineering application, the grouting method is used to improve the surrounding rock compressive strength to achieve the surrounding rock stability effect.