关键词: 煤矿破坏区, ABAQUS , 二次开采

Abstract: In order to further improve the recovery rate of coal resources and avoid waste of resourc⁃ es，many coal mines need to carry out secondary mining. ABAQUS is used for numerical simulation to ana⁃ lyze the influence of secondary mining process on the stability of the original stope structure. The results show that with the advance of the secondary mining face，the stress distribution on both sides of the failure zone changes continuously，and the stress concentration area is gradually formed，and the stress peak is reached in the cutting layer of the working face. The displacement of the roof also gradually increases with the advancement of the working face，and there are more mining cracks formed，and the degree of mining influence is large. When the secondary mining face advances to 0 m from the failure zone，the increase of roof displacement slows down，and the high-thickness loose rock layer provides a certain buffer effect for the roof.

Key words: coal mine failure area, ABAQUS, secondary recovery