Intermediate-Scale Underground Magazine Explosion Tests Decoupled Ground Motion Experiments

Abstract : A series of decoupled detonations were conducted in a one-third-scale underground magazine system. Chamber loading densities for these experiments were 1, 5, 15, and 42 kilograms per cubic-meter. The Composition B explosive sources included cast cubes (20.3-cm), reclaimed flaked material and M-15 mines. Ground motion sensors were grouted into holes drilled into a side wall and the roof of the detonation chamber, and in the wall of the main drift out to the portal. In addition, seismic instrumentation was placed at selected sites up to 6 kilometers from the center of the chamber. This paper presents an analyses of the measured data.