Based　on　the　summarized　characteristics　of　vein　rockburst　in　the　Uzbekistan　Kamchik　tunnel,　the　paper　analyzed　the　formation　mechanism　of　vein　rockburst,　established　the　mechanical　model　of　the　most　dangerous　vein　rockburst　in　side　wall　of　Kamchik　tunnel　and　proposed　corresponding　controlling　technology　for　rockburst.　The　research　shows　that　the　characteristics　and　hazards　of　vein　rockburst　are　closely　related　to　the　location　and　thickness　of　the　vein.　The　formation　mechanism　of　this　rockburst　type　is　inconsistent　with　rockburst　under　single　lithology.　Vein　rockburst　occurred　in　vault　of　Kamchik　tunnel　results　from　the　maximum　tangential　stress　on　vault　after　tunnel　excavation.　Exposed　vein　rockburst　of　side　wall　is　caused　by　excavation　unloading　and　vertical　stress　concentration　in　side　wall,　and　the　mechanical　model　can　be　simplified　as　the　crushing　instability　when　the　thin　vein　plate　is　cut　by　unloading　crack　after　the　vertical　stress　concentration.　Hidden　vein　rockburst　behind　side　wall　is　mainly　due　to　the　horizontal　extrusion　of　the　vein　behind　granite　and　the　vertical　stress　concentration　of　side　wall　after　tunnel　excavation.　The　mechanical　model　can　be　simplified　as　the　bending　and　breaking　of　the　free　rock　plate　(pillar)　of　the　side　wall　under　the　combined　action　of　vertical　stress　and　horizontal　compression　of　the　vein.　The　horizontal　extrusion　of　vein　towards　granite　rock　plate　(pillar)　of　the　side　wall　is　a　major　contributor　to　hidden　vein　rockburst　behind　side　wall.　It　mainly　comes　from　the　＇Wedge　extrusion＇　caused　by　intrusion　of　vein　and　the　horizontal　extrusion　from　the　horizontal　differential　deformation　between　vein　and　granite　that　are　suppressed　by　granite.　Hence,　timely　application　of　anchors　on　the　side　wall　is　an　efficient　way　to　prevent　vein　rockburst　of　side　wall.　©　2021,　Science　Press.　All　right　reserved.