Traditional　rock　burst　always　forms　the　V-shaped　groove　in　tunnel　sidewall,　and　the　interaction　characteristics　and　mechanisms　between　the　original　fractural　plane　and　potential　V-shaped　failure　region　are　not　yet　clear.　We　thus　carried　out　the　numerical　investigation　through　PFC2D　software　to　explore　the　interaction　features　between　the　above　objects.　Three　sets　of　post-processing　analyses　are　applied,　the　moment　tensor　inversion　helps　to　reveal　the　quantitative　intensity　and　specific　patterns　of　secondary　damage,　the　events　cluster　analysis　through　the　Kmeans++　clustering　method　calibrates　the　development　process　of　spalling　failure　at　different　positions,　and　the　principal　stress　estimation　can　predict　the　extent　and　maximum　depth　of　the　V-shaped　groove.　Numerical　simulations　proved　that　the　fractural　plane　cannot　affect　the　failure　process　of　the　intact　surrounding　rock　in　left　sidewall,　and　the　fractural　plane　leads　to　the　early　appearance　of　secondary　failures　in　the　right　sidewall;　as　the　fractural　plane　moves　outward,　the　size　of　V-shaped　failure　region　and　the　dominant　mode　of　secondary　failures　gradually　change;　when　the　fractural　plane　is　outside　the　potential　V-shaped　failure　zone,　the　local　failure　(caused　by　fractural　plane)　and　spalling　failure　(started　at　tunnel　free　surface)　exhibit　independent　development　during　majority　period　of　the　test.　©　The　Author(s)　under　exclusive　licence　to　OWZ　2024.