Blasting construction method for protecting main body structure of tunnel pile method subway station

The invention discloses a blasting construction method for a tunnel pile method subway station protection main body structure. Comprising the following steps: (1) excavating a vertical shaft: excavating an earthwork machine at the upper part of the vertical shaft, and excavating a vertical shaft body in a medium and slightly weathered rock stratum by adopting underholing blasting; (2) transverse channel blasting construction is conducted, specifically, mining method blasting is adopted, upper and lower step tunnel blasting is adopted, the arch-shaped part of the transverse channel is an upper step, a lower step is arranged below the arch-shaped part of the transverse channel, and during blasting, the upper step is firstly blasted, and blasting is conducted from top to bottom; (3) pilot tunnel blasting construction is conducted, specifically, according to a micro-step division method, the middle of a lower step is excavated firstly, and then a side wall is excavated; step blasting of vertical drilling is adopt