MULTIPLE THREAT CRATERING EXPERIMENT. VOLUME 1. SUCCESSIVE CRATERING IN HARD ROCK
Technical rept. Jan-Dec 1965
BOEING CO SEATTLE WA
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A research program compares successive craters formed by high- explosive charges detonated in basalt along a common vertical axis with single explosions equivalent in yield to the sum of the successive burst. Studies include craters and ejecta distribution energy coupling of cratering explosions at and near the ground surface charge shape effect on craters and related phenomena and distribution, size, and weight of discrete ejecta missiles. Results indicated that the excavated crater depth may be increased by a fourth half-buried successive shot. This increase is between zero and 25 percent, depending on the technique used. The data were not conclusive. The apparent crater formed by a hemispherical surface charge exhibits a radius about 90 percent and depth about 85 percent of the dimensions formed by a corresponding spherical, half-buried charge. Excavated craters formed by hemispherical charges are likewise smaller.
- Geology, Geochemistry and Mineralogy