Abstract: Taking Shenjiao Mine as the engineering background,based on the on-site monitoring of the damage pattern of 2# coal seam roadway,in order to control the formation and development of the surrounding plastic zone of the roadway,the FLAC3D numerical simulation method is used to analyze the different distribution patterns of the plastic zone shape of the roadway under different angle deflections of the main stress around the roadway.According to the deformation and failure mode of the main road affected by the mining face and the service content and age of the later alley,the design of the renovation of the main road is carried out,and the designed renovation plan is applied for engineering,good results is obtained,which can provide reliable reference for the similar mines.

Key words: Deformation of surrounding rock, Principal stress, Numerical simulation, Plastic zone