Size effect experimental study of strength and deformation in different height-to-diameter ratio soft rocks

作者：Chen Yu; Huang Yong Heng; Cao Ping; Yi Yong Liang; Li Na; Li Li Juan

来源：Journal of Central South University(Science and Technology), 2010, 41(3): 1073-1078.

• Deformation modulus
• Different heights
• Experimental studies
• Failure of rock specimens
• Marble rock
• Rock specimen
• Shear failure
• Size effects
• Soft rocks
• Splitting failure
• Testing machine
• Uniaxial compression tests

The lean ore and dolomite marble rock samples with the same diameter (about 50 mm) and the ratio of height to diameter (1-2) were studied. The uniaxial compression tests were carried out on a servo-controlled testing machine, and the size effect was compared. The results show that the curvature of stress-strain curves increases with the increase of the ratio of height to diameter. The rock';s deformation modulus and elastic modulus increase nonlinearly with the increase of the ratio of height to diameter. The failure of rock specimens with small ratio of height to diameter is quite complex, but it shows as splitting failure and shear failure with high ratio of height to diameter. The compressive strength increases with the increase of the ratio of height to diameter.

• 出版日期2010
• 单位中南大学