Abstract
A large fraction of the material ejected by a near-surface detonation impacts just beyond the crater to form the crater lip. For certain combinations of explosive energy, charge configuration and cratering medium, the accumulating ejecta blanket in the lip region becomes so thick that the crater walls become unstable. A model that includes the post-impact redistribution of impacting material to maintain slope stability is presented. This model has three components: a source and ejecta trajectory model, a true crater/upthrust scaling law and a slope failure model. Calculated apparent crater contours and ejecta blanket thickness distributions in the lip region are in good agreement with results of field tests.
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