Abstract: The paper presents the pushing-wall hypothesis; analyses three primary premises for two-hole to slip in blasting by this hypothesis, i.e. free face, compensation space and joint pushing effect; with these conditions as standard, makes a comparison among large space millisecond blasting, compression blasting, T type blasting, wave type blasting and large hole-distance blasting; and designs a new blasting mode-pushing-wall blasting. The key technical points of pushing-wall blasting include triangular-hole layout, inter-row igniting and enlarging the toe of the front row to reduce hole space. The pushing-wall hypothesis holds that all pre-splitting blasting, smooth blasting, energy accumulation blasting, large hole-space blasting and pushing-wall blasting originate from the same blasting mechanism and they are all specific applications of the fact that the rock between two holes is easy to slip in the single row simultaneous blasting.

Key words: Blasting mechanism, Pushing-wall hypothesis, Pushing-wall blasting, Millisecond blasting