Research on the Three Factors Influencing the Effect of Parallel Hole Cut Blasting

Abstract

These problems often occur in parallel hole cut blasting: the poor cutting effect or even failure, the high residual hole rate, the small cavity volume and so on. In order to solve these problems, combining with rock blasting theory and engineering blasting construction experience, this paper will study the influence mechanism of borehole deviation, blasting hole blocking and initiation mode. It is concluded that the effect of borehole deviation on the blasting effect is eliminated when the spacing of empty hole and charging hole is less than the radius of crushing zone, reasonable blocking length and good blocking can effectively improve the blasting effect, and compared with the positive initiation, the reverse initiation can increase the time of the explosion, reduce the energy loss and improve the blasting effect.