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- W2373700219 abstract "Based on the brittle failure criterion,the relationship between different in-situ stress environments,opening shapes,openings and the depths of brittle failure af were analyzed by Examine2D software.Based on the rule of in-situ stress in China,a series of analyses were carried out to investigate the depth of brittle failure for circular shape in sedimentary.The results show that with the increase of principal stress ratio k,the depth of brittle failure af increases in the form of line and damaged region diverges the direction of the minimum principal stress to the angle of 45- between the minimum in-situ stresses.The damaged region in single opening is axisymmetric,but point-symmetric in openings.Yield region of openings is easy to merge when the angle between the maximum principal stress direction and cavern connection line is 45-.With the increase of the spacing of openings,cavern group effect reduces gradually and the depth of brittle failure is almost equal to that of the single opening.Stress concentration factors in different excavation shapes are different.The depth of brittle failure effectively reduces when the length of prolate axis and minor axis equals k.With the increase of σc,af shows increase trend in the form of exponent.When σc is greater than(9σ10-3σ30),there will be no brittle failure.Magmatic and metamorphic are compared with those in practical engineering,indicating that the results agree well to each other.It can be used to predict the depth of brittle failure in underground excavation." @default.
- W2373700219 created "2016-06-24" @default.
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- W2373700219 date "2010-01-01" @default.
- W2373700219 modified "2023-09-22" @default.
- W2373700219 title "Influence of in-situ stress on stability of underground openings in hard rock" @default.
- W2373700219 hasPublicationYear "2010" @default.
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