Abstract: A blast treatment method for blasting an object includes: a step in which an explosive is detonated inside a pressure vessel (30) which has an elasto-plastic metal, thereby imparting to the pressure vessel (30) an initial load wherein the primary and secondary stress generated in at least a portion of the pressure vessel becomes high enough to be in a plastic region exceeding the elastic region, thereby generating a shakedown state in the pressure vessel (30); and a subsequent step in which a treatment explosive (50) is detonated within the pressure vessel (30), thereby blasting the object (10).

Abstract: Provided is a blast treatment method with which the object to be treated can be treated more reliably and efficiently. This method includes: a step wherein an explosive is detonated inside a pressure vessel (30) comprising an elasto-plastic metal, thereby imparting to the pressure vessel (30) an initial load wherein the primary + secondary stress generated in at least a portion of the structural parts of the pressure vessel becomes a stress that is included in a plastic region exceeding the elastic region, thereby generating a shakedown state in the pressure vessel (30); and a subsequent step wherein a treatment explosive (50) is detonated within the pressure vessel (30), thereby blasting the object (10) to be treated.

Abstract: It is intended to provide a pressure container which can prevent dispersion of a hazardous substance or the like to the exterior and ensure a high level of safety with a simple structure. To achieve this object, a pressure container (10) comprises an outer vessel (30) and an inner vessel (40) which receives an impact load produced at the time of blasting disposal operation. The inner vessel (40) is disposed inside the outer vessel (30). The inner vessel (40) has a pressure relieving part (50) which can discharge part of high-pressure gas produced in the inner vessel (40) at the time of the blasting disposal operation into a gap formed between the inner vessel (40) and the outer vessel (30).

Abstract: The present invention aims at estimating a residual life of a blasting vessel. For the estimation, a strain gauge 30 is attached to a blasting vessel 10. The strain gauge 30 measures high-frequency repetitive strain caused in the blasting chamber 10 in each explosion. Strain waveform data obtained with the strain gauge 30 is analyzed to calculate the cumulative degree of fatigue damage due to a high-frequency repetitive load applied to the blasting vessel 10 in each explosion. A residual life of the blasting vessel 10 is estimated on the basis of a cumulative value of the cumulative degrees of fatigue damage.

Abstract: It is intended to provide a pressure container which can prevent dispersion of a hazardous substance or the like to the exterior and ensure a high level of safety with a simple structure. To achieve this object, a pressure container (10) comprises an outer vessel (30) and an inner vessel (40) which receives an impact load produced at the time of blasting disposal operation. The inner vessel (40) is disposed inside the outer vessel (30). The inner vessel (40) has a pressure relieving part (50) which can discharge part of high-pressure gas produced in the inner vessel (40) at the time of the blasting disposal operation into a gap formed between the inner vessel (40) and the outer vessel (30).

Abstract: The present invention aims at estimating a residual life of a blasting vessel. For the estimation, a strain gauge 30 is attached to a blasting vessel 10. The strain gauge 30 measures high-frequency repetitive strain caused in the blasting chamber 10 in each explosion. Strain waveform data obtained with the strain gauge 30 is analyzed to calculate the cumulative degree of fatigue damage due to a high-frequency repetitive load applied to the blasting vessel 10 in each explosion. A residual life of the blasting vessel 10 is estimated on the basis of a cumulative value of the cumulative degrees of fatigue damage.