Mechanics of Rock Massive Disruption: Implementation to Planetary Cratering Processes

Details Mechanics of Rock Massive Disruption: Implementation to Planetary Cratering Processes Mechanics of Rock Massive Disruption: Implementation to Planetary Cratering Processes

Mar 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996lpi....27..677k&link_type=abstract

Lunar and Planetary Science, volume 27, page 677

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Blocky Rocks: Behavior, Craters: Impact

Scientific paper

Impact crater formation disrupts rocks in the vicinity of a crater. The small scale analog of the process is an underground nuclear explosion. The data on rock disruptions due to explosions are summarized. The linearly scaled estimates are compared with observational data from terrestrial impact craters. Large deformations in hard rocks inevitably connect with such complex phenomena as material crushing, plastic flow, violation of continuity conditions at faults, joints and others structures. The majority of investigations carries out with laboratory samples, but rock massive properties in situ, especially at high deformations, essentially differ from sample properties. Numerical simulations are usually based on a continuous media approximation and do not take into account differential motions of individual rock blocks. The opinion exists, that at high pressures which appear around an impact crater, the rock massive structure has only minor influence at deformation processes. It is not the case, as illustrated, for example, with experimental data, obtained recently from the analysis of deep drilling results for Puchezh-Katunki impact structure in Russia.

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