Effect of initial minimum principal stress and unloading rate on the spalling and rockburst of marble: a true triaxial experiment investigation
Sign Up to like & getrecommendations! Published in 2020 at "Bulletin of Engineering Geology and the Environment"
DOI: 10.1007/s10064-020-01995-5
Abstract: Hard rock often performs as brittle failures, such as cracking, spalling, and rockburst, induced by excavation in deep underground engineering. To understand the effect of the minimum principal stress and unloading rate on the spalling… read more here.
Keywords: principal stress; unloading rate; minimum principal; initial minimum ... See more keywords
A numerical investigation of element size and loading/unloading rate for intact rock in laboratory-scale and field-scale based on the combined finite-discrete element method
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DOI: 10.1016/j.engfracmech.2019.02.007
Abstract: Abstract The combined finite-discrete element method (FDEM) is extensively employed to model rocks and rock-like materials, in which calibration against the results from uniaxial/triaxial compression tests, Brazilian tests and shear tests have been widely carried… read more here.
Keywords: unloading rate; element; element size; size loading ... See more keywords
An Investigation on the Impact of Unloading Rate on Coal Mechanical Properties and Energy Evolution Law
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DOI: 10.3390/ijerph19084546
Abstract: In order to further explore the relationship between the excavation speed and the damage of surrounding rocks and dynamic manifestation, the stress paths of unloading confining pressure and loading axial pressure were designed based on… read more here.
Keywords: unloading rate; energy; coal; mechanical properties ... See more keywords