BLASTING METHOD

PROBLEM TO BE SOLVED: To dissipate excessive clearance water pressure in a short period of time and to reduce foundation vibration in the specified direction out of foundation vibration due to blasting. SOLUTION: A clearance water pressure dissipation part 2 is provided in a peripheral foundation of a blasting hole 1 at the time of blasting by using the blasting hole 1 drilled in the foundation. It is possible to provide the clearance water pressure dissipation part 2 by drilling a clearance water pressure dissipation hole (groove is available) extending at least lower than a ground water level in a peripheral foundation of the blasting hole 1. On a soft foundation high at an underground water level, as the clearance water pressure dissipation hole 2A does not selft-support it until after drilling or blasting, a water permeable material of a gravel material, etc., is charged in the inside of the dissipation hole 2A.