This　study　experimentally　investigated　the　internal　fracture　geometries　and　hydraulic　properties　of　deformable　rock　samples　subjected　to　various　loading　paths.　Three　loading　paths,　uniaxial　compression,　conventional　triaxial　compression,　and　triaxial　prepeak　unloading,　were　administered　to　granite　samples.　A　high-precision　X-ray　microfocus-computed-tomography　scanning　system　was　adopted　to　explore　the　internal　failure　modes　of　the　deformable　samples,　and　a　series　of　flow　tests　with　different　hydraulic　pressures　and　confining　stresses　were　then　performed.　The　results　show　that　the　samples　after　uniaxial　compression　exhibit　a　typical　splitting　failure　mode;　however,　for　conventional　triaxial　compression　and　prepeak　unloading,　the　samples　generally　show　tensile-shear　failure　modes.　The　relationship　between　the　flow　rate　and　pressure　gradient　of　the　sample　after　uniaxial　compression　can　be　best　described　using　the　Forchheimer　law.　Both　the　linear　and　nonlinear　coefficients　in　the　Forchheimer　law　increase　with　increasing　confining　stress.　As　the　confining　stress　increases　from　4　to　20　MPa,　the　critical　hydraulic　gradient　that　quantifies　the　onset　of　nonlinear　flow　increases　from　5.33　to　56.74,　but　the　transmissivity　decreases　due　to　the　fracture　closure.　For　water　flow　through　the　samples　after　conventional　triaxial　compression　and　prepeak　unloading,　two　representative　types　of　nonlinear　flow　behaviors　induced　by　inertial　effects　and　fracture　dilation　were　observed.　Different　loading　paths　lead　to　different　failure　mechanisms　and　thus　different　fluid-flow　responses,　and　the　samples　subjected　to　prepeak　unloading　with　a　high　confining　pressure　possess　a　more　significant　flow　capacity.