The　complex　stress　conditions　and　disturbed　environment　are　important　factors　affecting　the　safe　exploitation　of　deep　mining　resources.　This　paper　designed　experiments　on　multi-level　cyclic　loading　pre-damaged　granite　under　different　confining　pressures,　as　well　as　experiments　on　the　uniaxial　recompression　of　pre-damaged　granite.　The　results　indicate　that　the　mechanical　properties　of　granite　exhibit　significant　differences　under　low　and　high　confining　pressures.　When　the　number　of　cycles　is　fixed,　with　increasing　confining　pressure,　the　axial　peak　strain　displays　a　trend　of　increasing-decreasing-increasing.　In　the　process　of　uniaxial　re-compression,　the　crack　pattern　of　natural　granite　is　tensile-tensile-tensile-shear,　while　the　crack　pattern　of　damaged　granite　under　low　confining　pressures　(10,　30　MPa)　is　tensile-tensile-tensile-tensile,　which　exhibits　significant　differences　under　high　confining　pressures　(50,　80　MPa).　When　the　CV(r)　value　of　natural　granite　exceeds　1.2,　it　will　failure.　However,　for　pre-damaged　granite　under　low　confining　pressures　of　10　or　30　MPa,　a　CV(r)　value　greater　than　0.25　can　be　used　as　a　criterion　to　determine　whether　the　damaged　granite　has　failed.　In　contrast,　for　pre-damaged　granite　under　high　confining　pressures　of　50　or　80　MPa,　both　the　CV(r)　value　and　the　b-value　need　to　be　considered　to　determine　its　failure.　©　2025