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- W2364179792 abstract "Breakout or spalling often occurs at the excavation damage zone of hardrock underground chamber,which controls the stability of rock body.Experiment of circular borehole sample of siltstone in bidirectional unequal pressure loading is conducted,and strain gauge is adopted to monitor the deformation,then the breakout and spalling formation,evolution,and further destruction form are investigated.By experimental studying the stress evolution curves of the observation point on the borehole specimen surface,the mechanism of breakout or spalling is analyzed.It showed that the brittle hardrock borehole wall is not easy to damage in bidirectional unequal pressure loading,but when the loading reach a particular level,the borehole wall begin to damage suddenly and the breakout-V form develop rapidly.It is found that shear failure is near the borehole wall,while compression-shear mixed failure is deep inside the borehole wall." @default.
- W2364179792 created "2016-06-24" @default.
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- W2364179792 date "2011-01-01" @default.
- W2364179792 modified "2023-09-27" @default.
- W2364179792 title "Electrometric experimental study on the deformation and failure of the rock with borehole" @default.
- W2364179792 hasPublicationYear "2011" @default.
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