Strength and deformation behaviors of veined marble specimens after vacuum heat treatment under conventional triaxial compression

• Published in: Acta mechanica Sinica Vol. 33; no. 5; pp. 886 - 898
• Main Authors: Su, Haijian, Jing, Hongwen, Yin, Qian, Yu, Liyuan, Wang, Yingchao, Wu, Xingjie
• Format: Journal Article
• Language: English
• Published: Beijing The Chinese Society of Theoretical and Applied Mechanics; Institute of Mechanics, Chinese Academy of Sciences 01.10.2017; Springer Nature B.V; State Key Laboratory for Geomechanics and Deep Underground Engineering,China University of Mining and Technology,Xuzhou 221116,China
• Edition: English ed.
• Subjects: angle;Hoek–Brown; Classical and Continuum Physics; compression;High; Compressive strength; Computational Intelligence; Confining; criterion; Critical temperature; Deformation effects; Elasticity; Engineering; Engineering Fluid Dynamics; Geothermal resources; Heat treatment; High temperature; Marble; marble;Conventional; Radioactive wastes; Research Paper; Rocks; Temperature effects; temperature;Vein; Theoretical and Applied Mechanics; triaxial; Triaxial compression tests; Veined; High temperature; Veined marble; Vein angle; Conventional triaxial compression; Hoek–Brown criterion; Conventional triaxial com-pression
• ISSN: 0567-7718; 1614-3116
• DOI: 10.1007/s10409-017-0653-z

The mechanical behaviors of rocks affected by high temperature and stress are generally believed to be significant for the stability of certain projects involving rocks, such as nuclearwaste storage and geothermal resource exploitation. In this paper, veined marble specimens were treated to high temperature treatment and then used in conventional triaxial compression tests to investigate the effect of temperature, confining pressure, and vein angle on strength and deformation behaviors. The results showthat the strength and deformation parameters of the veined marble specimens changed with the temperature, presenting a critical temperature of 600 ?C. The triaxial compression strength of a horizontal vein (β = 90?) is obviously larger than that of a vertical vein (β = 0?). The triaxial compression strength, elasticity modulus, and secant modulus have an approximately linear relation to the confining pressure. Finally, Mohr–Coulomb and Hoek–Brown criteria were respectively used to analyze the effect of confining pressure on triaxial compression strength.