In　order　to　study　the　vibration　response　of　the　interlaid　rock　in　the　small　clear　distance　tunnel　under　the　blasting　load,　a　field　blasting　vibration　test　was　carried　out　based　on　the　blasting　project　of　the　Xiaolongmen　tunnel.　The　improved　variational　mode　decomposition　(VMD)　and　multi-scale　permutation　entropy　(MPE)　algorithm　were　employed　to　denoise　the　blasting　vibration　signal.　Subsequently,　the　differences　in　vibration　characteristics　between　the　left　arch　waist(non-interlaid　rock　area)　and　right　arch　waist(interlaid　rock　area)　of　the　tunnel　were　analyzed,　along　with　a　comparison　and　analysis　of　seismic　wave　attenuation　characteristics　generated　by　cut　hole　blasting　and　surrounding　hole　blasting.　The　results　demonstrate　that　the　improved　adaptive　VMD-MPE　algorithm　enables　automatic　determination　of　modal　number　K　and　penalty　factor　α　while　effectively　eliminating　noise　from　the　vibration　signal,　reducing　subjective　decision-making　influence.　During　posterior　excavation　tunnel　face　blasting,　interlaid　rock　exhibits　significant　amplification　effects　on　blast　vibrations.　Peak　particle　velocity(PPV)　values　are　higher　in　interlaid　rock　compared　to　non-interlaid　areas.　However,　vibrations　attenuate　faster　within　interlaid　rock　regions.　Additionally,　analysis　reveals　that　low-frequency　vibrations　below　40　Hz　account　for　a　substantial　proportion　of　energy　within　interlaid　rock　areas　when　comparing　frequency　characteristics　at　measuring　points　between　non-interlaid　and　interlaid　regions.　Attention　should　be　given　to　these　low-frequency　vibrations　as　they　are　more　likely　to　induce　resonance　in　supporting　structures,　posing　higher　risks　of　damage　or　destruction　within　interlaid　rock　zones.　By　analyzing　the　blasting　vibration　characteristics　of　the　cut　hole　and　the　surrounding　hole,　it　can　be　found　that　the　vibration　velocity　generated　by　the　surrounding　hole　blasting　in　the　surrounding　rock　behind　the　tunnel　face　is　greater　than　that　of　the　cut　hole　blasting　within　the　range　of　the　scale　distance(SD)　which　is　less　than　or　equal　to　11.　57　m　kg1/3　due　to　the　effect　of　ćorner　weakening＇　and　the　influence　of　the　seismic　wave　propagation　path.　After　exceeding　the　critical　value　of　SD,　the　vibration　velocity　generated　by　the　cut　hole　blasting　is　greater.　©　2024　BLASTING　Magazine　Editorial　Office,　Wuhan　University　of　Technology.　All　rights　reserved.