Study on the rebounding hypothesis of blasting mechanism and rebounding-off blasting

After an occasional finding in a bench blasting, we had begun to doubt all of the authoritative theory about pre-splitting blasting. By means of a series of experiments, it was proved that even the stress wave and the explosive gas ware all not existed, we also can get the splitting. To make it clear, the author expounded three basic presumes, established a model to describe the stress state of the rock in the course of exploding, and originated the rebounding-off hypothesis and a new blasting method-rebounding-off blasting, in which the buffer holes were the real power source. According to the rebounding-off hypothesis, just as the rebounding holes was in the displacement district of the resilience, the rock in the displacement district of the resilience can release the storing elastic distortion energy when the rock in the Initiative displacement area moved forward, producing a pulling force perpendicular to the place connected two holes, which is the real force to produce crack. The rebounding-off blasting, different from the smooth blasting and pre-splitting blasting not only in the resource of the force but also in the mechanism, was a bland new blasting method.