Patent ID: 8464624

Claim:
A blast treatment method for carrying out blast treatment of a treatment subject, comprising: a blasting preparation step of housing a blasting explosive having fluidity in a container and placing the blasting explosive around a periphery of the treatment subject as well as attaching an initiation device to the container; a housing step of housing the container, the blasting explosive, and the treatment subject in a chamber; a decompression step of decompressing an inside of the chamber in a state where the chamber is sealed after the housing step; and a blasting step of initiating the blasting explosive by the initiation device and blasting the treatment subject by the blasting explosive, wherein the blasting preparation step includes the steps of: providing the container with a gas vent portion that regulates escape of the blasting explosive from the container while permitting escape of gases in the container; and hermetically sealing parts except the gas vent portion of the container, and in the decompression step, an inside of the container is decompressed through the gas vent portion while the inside of the chamber is decompressed.