To　comprehensively　investigate　the　effect　of　different　minimum　principal　stresses　on　the　stability　of　straight-wall　arched　tunnels,　the　static　stress　and　low-frequency　disturbances　are　applied　in　true　triaxial　loading　tests,　accompanied　by　acoustic　emissions　(AE)　and　internal　image　monitoring　for　damage.　The　results　show　that　(1)　increasing　the　minimum　principal　stress　(along　the　axial　direction　of　the　tunnel)　will　improve　tunnel　stability,　and　(2)　during　the　damage　process　of　straight-wall　arched　tunnels,　whether　caused　by　static　stress　or　low-frequency　disturbances,　the　dissipated　energy　and　AE　count　had　demonstrated　identical　increasing　trends　in　their　numerical　values.　(3)　When　the　straight-wall　arched　roadway　had　been　damaged　by　low-frequency　disturbances,　the　dissipated　energy　and　AE　count　had　increased　gradually　at　first　and　then　surged　rapidly　upon　macroscopic　damage,　following　a　trend　similar　to　an　exponential　function.Please　check　and　confirm　that　the　authors　and　their　respective　affiliations　have　been　correctly　identified　and　amend　if　necessary.We　have　confirmed　the　correctness　of　the　authors　and　their　affiliations　©　The　Author(s),　under　exclusive　licence　to　Springer-Verlag　GmbH　Germany,　part　of　Springer　Nature　2025.