Size, Location and Time of Initiation of Primary Defects in Rocs under Impact Destruction
I. P. SHCHERBAKOV, V. S. KUKSENKO†, A. E. CHMEL'
Ioffe Physico-Technical Institute, ul. Politekhnicheskaya 26, Saint-Petersburg, 194021 Russia
Keywords: ударное разрушение, горные породы, фрактолюминесценция, микротрещины, impact destruction, rocks, fractoluminescence, microcracks
Abstract
Samples of rocks with different physico-mechanical properties (three kinds of granite, marble and quartzite) were subjected to destruction by impacts. Fractoluminescence was recorded on the damaged surface, and amplitudes and frequencies of series of light pulses were determined. On all test samples, initiation of inter-grain cracks was observed. Defects on the surface of grains in granite samples had two typical sizes conformable with defects in quartz and spar, while uniform content minerals (marble and quartzite) features unimodal distribution of sizes of defects on the surface of grains.
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