On the problem of the disintegration of rock by an explosion under the influence of a free surface

When an explosion takes place underground, an intensive disintegration of the soil, known as spalling, takes place in the region of the epicenter of the explosion. Spalling also occurs in the case of an ejection explosion which precedes the stage of dispersal of the soil. Spalling disintegration tak...

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Bibliographic Details
Published in:Journal of applied mechanics and technical physics 1981-01, Vol.22 (3), p.401-408
Main Author: Shishkin, N. I.
Format: Article
Language:English
Subjects:
elasticity
explosions
soil science
spalling
stress
wave propagation
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Summary:When an explosion takes place underground, an intensive disintegration of the soil, known as spalling, takes place in the region of the epicenter of the explosion. Spalling also occurs in the case of an ejection explosion which precedes the stage of dispersal of the soil. Spalling disintegration takes place because the compression-stress wave emitted by the focus of the explosion interacts with the free surface of the medium; in this interaction the compression wave is converted into a tension wave. In the present study, the problem of spalling in an underground explosion is solved for elastic solids whose stability with respect to tension is much less than their stability with respect to compression and shear. Such materials include, for example, soils and rocks (to the extent that they can be regarded as linearly elastic solids).
ISSN:0021-8944
1573-8620
DOI:10.1007/BF00907569