ISSN:
1013-9826
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
Based on the hypothesis of equivalent strain energy and the theories of fracturemechanics and damage mechanics，the constitutive model and fracture damage mechanism ofbolted discontinuous jointed rockmass are systematically studied under the state of complex stresses.Initially ， considering the equivalent strain energy ， the constitutive relation of anchoreddiscontinuous jointed rockmass is derived under the state of compression-shear stresses. Theconstitutive relation under the state of tension-shear stresses is also developed according to the theoryof self-consistence. Next，the damage evolution equations of discontinuous multi-crack rockmassunder compression-shear and tension-shear are put forward according to the wing crack-initiatingcriterion. Finally，based on the above constitutive models and the damage evolution equationsthree-dimensional finite element procedures have been developed to evaluate the stability anddeformability of the surrounding rock mass during excavation and supporting. The calculated resultsindicate that above-mentioned constitutive relation and the damage evolution equations are available
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/54/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.348-349.189.pdf
