This　paper　attempts　to　calculate　the　exact　initial　shock　pressure　of　borehole　wall　induced　by　the　blasting　with　axially　decoupled　charge.　For　this　purpose,　Starfield　superposition　was　introduced　considering　the　attenuation　and　superposition　of　blasting　pressure,　and　the　theoretical　solution　of　initial　borehole　wall　pressure　was　obtained　for　the　upper　and　middle　air-decked　charging　structures.　Then,　the　explosive　pressure　field　around　the　borehole　was　measured　by　cement　mortar　models　and　a　dynamic　pressure　test　system,　and　the　pressures　at　multiple　measuring　points　were　simulated　with　numerical　models　established　by　ANSYS/LS-DYNA.　The　results　show　that　the　deviations　between　simulated　and　theoretical　pressures　are　smaller　than　10%,　indicating　the　reliability　of　the　theoretical　formula　derived　by　Starfield　superposition.　For　the　upper　air-decked　charging　structure,　the　initial　shock　pressure　of　the　charging　section　followed　a　convex　distribution,　with　the　peak　value　near　the　charge　centre.　With　the　increase　in　the　distance　from　the　charging　section,　the　borehole　wall　shock　pressure　in　the　air　gap　underwent　a　sharp　decline　initially　before　reaching　a　relatively　constant　level.　The　minimum　pressure　was　observed　at　the　hole　collar.　For　the　middle　air-decked　charging　structure,　the　pressures　at　both　ends　of　the　charging　section　obeyed　a　convex　distribution,　with　the　peak　value　near　the　charge　centre.　Finally,　the　author　optimized　air-decked　charging　structure　of　periphery　boreholes　within　Grade　III　surrounding　rocks　of　Banjie　tunnel,　China,　and　proved　the　enhancement　effect　of　the　theoretical　findings　on　smooth　blasting.　The　research　findings　provide　valuable　references　to　the　theoretical　and　experimental　calculation　of　air　column　length　and　other　key　parameters　of　air-deck　blasting　and　shed　new　light　on　the　charging　structure　determination　of　smooth　blasting　and　blasting　vibration　control　for　the　excavation　of　large-section,　deep　mining　roadways.