Based　on　field　investigation　for　tunnels　at　Jinping　II　Hydropower　Station,　four　primary　failure　types　of　deep　buried　marble　are　classified　and　their　failure　mechanisms　are　analyzed:　(1)　The　first　one　is　tensile　slabbing　rockburst.　The　rock　mass　near　tunnel　wall　is　slabbed　due　to　unloading　of　excavation;　at　the　same　time,　the　elastic　strain　energy　is　stored　in　the　slabs.　Then,　when　the　strain　energy　is　stored　sufficiently,　the　energy　is　released　suddenly　and　the　rockburst　occurs.　(2)　The　second　one　is　tensile　slabbing　spalling.　The　rock　mass　near　tunnel　wall　is　slabbed　due　to　unloading　of　excavation.　Then,　the　slabs　bend　to　inner　of　the　tunnel　and　break.　At　last,　the　instabilities　of　slabs　appear　and　they　collapse　down　from　the　tunnel　wall.　(3)　The　third　one　is　shear　rock　burst.　A　potential　wedge　of　rock　is　formed　in　the　rock　mass　near　the　tunnel　wall　because　of　the　shearing　action;　and　at　the　same　time,　the　elastic　strain　energy　is　stored　in　the　wedge.　Then,　the　wedge　is　pushed　out　from　the　tunnel　wall　and　the　rockburst　occurs　when　the　shear　stress　on　the　potential　shear　surface　exceeds　the　shear　strength　of　the　rock　mass.　(4)　The　last　one　is　shear　spalling.　A　wedge　of　rock　is　formed　in　the　rock　mass　near　the　tunnel　wall.　Then,　the　wedge　is　detaching　gradually　from　the　tunnel　wall,　and　at　last,　the　wedge　collapse　down　from　the　bottom　of　the　tunnel.　The　four　failure　types　may　occur　separately　or　combinatorially.　The　occurrence　frequency　of　tensile　failure　is　higher　than　that　of　shear　failure.　The　failure　classification　of　deep　buried　marble　is　useful　for　understanding　the　failure　mechanisms　of　depth　buried　and　intact　hard　rock　mass　and　tunnel　support　design.