Numerical simulation of the stability of deep roadway surrounding rock based on FLAC3D

Abstract

In view of the problems such as roadway section deformation caused by the roadway’s violent bottom drum, causing the roadway transportation and maintenance difficulties, the numerical simulation calculation software FLAC3D was used, and the numerical calculation was obtained, which was the vertical stress, horizontal stress distribution and plastic area distribution of the surrounding rock after the excavation of the roadway, and the analysis obtained the mechanism of the roadway bottom drum: because the weak top plate of the coal layer was disturbed by the weak top plate of the coal layer closer to the bottom of the roadway. Then the underside rock pressure of the roadway because of the bottom drum and continuous dynamic redistribution, and gradually to the right and deep development, and eventually lead to the bottom drum gradually deterioration and show left and right asymmetrical characteristics.