Abstract Based on the test of b rit t le m aterial, the dynam ic st ress2st rain characterist ics of the in term it ten t ly
cracked rock m ass are studied fo r the f irst t im e. The inf luence of dynam ic loading f requency and geom et ric
characterist ics of crack on dynam ic defo rm at ion p ropert ies are analysed.
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Received: 17 May 1999
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