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

作　　者：Haijian Su Hongwen Jing Qian Yin Liyuan Yu Yingchao Wang Xingjie Wu 

机构地区：[1]State Key Laboratory for Geomechanics and Deep Underground Engineering, China University of Mining and Technology

出　　处：《Acta Mechanica Sinica》2017年第5期886-898,共13页力学学报（英文版）

基　　金：supported by the National Basic Research 973 Program of China (Grant 2013CB036003);the National Natural Science Foundation of China (Grants 51579239, 51323004, and 41572263);the China Postdoctoral Science Foundation (Grant 2016M590518)

摘　　要：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 nuclear waste 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 show that the strength and deformation parameters of the veined marble specimens changed with the temperature, presenting a critical temperature of 600 . The triaxial compression strength of a horizontal vein () is obviously larger than that of a vertical vein (). 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.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 nuclear waste 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 show that the strength and deformation parameters of the veined marble specimens changed with the temperature, presenting a critical temperature of 600 . The triaxial compression strength of a horizontal vein () is obviously larger than that of a vertical vein (). 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.

关 键 词：Veined marble Conventional triaxial compression High temperature Vein angle Hoek-Brown criterion 

分 类 号：TU45[建筑科学—岩土工程]