EXPERIMENTAL AND NUMERICAL STUDY ON THE EFFECT OF FRACTURES ON THE MECHANICAL PROPERTIES OF ROCK MASS CONTAINING CAVITIES
In order to study the effect of cracks on the mechanical properties of rock mass containing hole under uniaxial compression,uniaxial compression test and numerical simulation were performed on cement mortar specimens containing hole and prefabricated single crack,and the effects of the dip angle i of prefabricated crack,the distance m between the prefabricated crack and hole,the length l of prefabricated crack on the mechanical properties of the specimen was studied.The research results show that when other parameters are constant,the experimental value and numerical simulation value of compressive strength basically show a gradually decreasing trend with the increase of l.When other parameters are constant,the variation law of the experimental value and numerical simulation value of uniaxial compressive strength with the dip angle i of prefabricated crack is not fixed.When other parameters are constant,the variation law of the experimental value and numerical simulation value of uniaxial compressive strength with the distance m is not fixed.The dip angle i of prefabricated crack,the distance m between the prefabricated crack and hole,and length l of the prefabricated crack have an influence on the development direction of the main crack and failure mode of the specimen.
artificial rock massprefabricated crackmechanical properties
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