›› 2007, Vol. 28 ›› Issue (10): 2155-2160.

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

Experimental study on deformation of purple sandstone in Dayao Copper Mine under uniaxial compression and direct tension

XIE Qiang1, 2, YU Xian-bin3, ZHANG Yong-xing1, NA Yu-kang4   

  1. 1. College of Civil Engineering, Chongqing University, Chongqing 400045, China; 2. Centro de Geotecnia, Instituto Superior Técnico, Universidade Técnica de Lisboa, Lisbon 1049-001, Portugal; 3. Faculty of Land Resources Engineering, Kunming University of Science and Technology, Kunming 650093, China; 4. Faculty of Mechanical Engineering, Kunming University of Science and Technology, Kunming 650093, China
  • Received:2005-10-18 Online:2007-10-10 Published:2013-10-15

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Abstract: A testing apparatus is introduced which can carry out both uniaxial compression tests and uniaxial tension tests on a same rock. This apparatus changes the situation of analyzing the test results from different rock samples under uniaxial compression and uniaxial tension respectively, which will lead to a wrong conclusion. And it also provides the possibility for studying the transitional characteristic of rock from being compressed to being sketched or from being sketched to being compressed. Furthermore, the deformation behavior of purple sandstone in Dayao Copper Mine is studied. The research indicates that the compressive elastic modulus of purple sandstone equals to the tensile elastic modulus, but the changes of Poisson's ratio in compression and that in tension are complicated. The tests also prove that rock compression and tension are not quite different courses. The deformation curve of unloading in compression joins continuously together with that of loading in tension.

Key words: rock, direct tension, uniaxial compression, deformation behavior

CLC Number: 

  • TU 458+.3
  • Please send e-mail to pingzhou3@126.com if you would like to read full paper in English for free. Parts of our published papers have English translations.
  • Please send e-mail to pingzhou3@126.com if you would like to read full paper in English for free. Parts of our published papers have English translations.
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