Novel hole distribution structure for blasting excavation of small-section hard rock tunnel

The utility model discloses a novel hole distribution structure for blasting excavation of a small-section hard rock tunnel, which belongs to the technical field of construction engineering construction and comprises empty holes, inner and outer layer slotting holes, inner and outer layer main blasting holes, peripheral holes and bottom holes. The empty holes and the inner-layer slotting holes are formed in the center position of a tunnel face, the empty holes and the inner-layer slotting holes are distributed alternately to form a hexagonal structure, the inner-layer slotting holes are located in the center of the hexagon, and the empty holes are distributed around the inner-layer slotting holes; the outer-layer slotting hole is of a vertical hexagonal structure and is formed in the outer side of the empty hole; an inner-layer main blasting hole and an outer-layer main blasting hole which are similar to excavation lines of a tunnel side wall and a top arch are formed in the outer part of the outer-layer slot