EXPERIMENTAL RESEARCH ON THE EXPLOSION VELOCITY OF WATER-GEL EXPLOSIVE WITH INNER PIPE

摘要

To increase the utilization efficiency of blasting energy and improve the blasting effect, it is important to realize impedance matching between the explosive and blasting medium. But once the blasting medium is chosen, the impedance matching can be realized only by adjusting the charge density or explosion velocity, and altering the charging construction is one of the effective methods. An inner-pipe charging construction can be constituted by putting copper pipe,iron pipe and paper pipe with varied internal diameter (Φ4mm, Φ6mm, Φ9mm) on the axis of the ordinary water-gel explosive(diameter Φ35 mm). Then the explosion velocity can be measured and the changing regularity analyzed. The results show that under such experimental condition, the explosion velocity of water-gel explosive changes in a mode of rising first and falling later with the increase of inner-pipe diameter. When the inner-pipe diameter is 6mm, the explosive velocity is at its maximum value, but the charging ratio of the explosion velocity varies with different inner-pipe materials.