Spiral tunnel blasting drilling construction implementation method

The invention discloses a spiral tunnel blasting drilling construction implementation method. The method comprises the following steps that a mathematical calculation model of a hole depth differencevalue delta L with respect to R1 and a tunnel cross section width B is deduced according to a geometrical relationship; an extrapolation angle deviation angle beta caused by a tunnel spiral route development is considered in the aspect of extrapolation angles of peripheral holes, and the relation of the beta with respect to the tunnel footage L and the tunnel spiral route development radius R is determined through the geometrical relation; and construction is guided based on the two geometric reasoning calculation models; and the footage of the near-center side of the tunnel is reversely deduced according to an over-limit and under-limit excavation value of the tunnel by using the Pythagorean theorem so as to determine the maximum limit value of the circulating footage, after the circulating footage is determined