High-step small-aperture vertical drilling lateral funnel group blasting excavation process

The invention discloses a blasting excavation process for a high-step small-aperture vertical drilling lateral funnel group. The hole diameter of the drill hole is much smaller than that of a conventional one-time detonating step height matched drill hole, the blasting explosive quantity is calculated according to lateral funnel group blasting characteristic parameters instead of the product of explosive unit consumption and the volume of corresponding broken rocks, so that the step grading height requirement is met, and side slope steps or roadbed bottom plates are prevented from being damaged; the working procedures of moving a drill carriage for multiple times, drilling holes, charging explosives, connecting lines, shoveling, transporting, transferring explosives in multiple batches and the like are reduced, inconvenience in operation is avoided, the construction cost is reduced, and the safety risk is reduced. The invention has the following technical characteristics; the corresponding drilling depth of a