A PRELIMINARY STUDY OF SIZE EFFECT BEHAVIOUR OF ROCK SPECIMENS
To completely recognize size effect, this paper discusses a relative compressive strength experiment which adopts different size specimens using granite porphyry (100×100×20mm) and Diorite (130×100×80mm). Results show that the size effect has obvious differences on the strength of the specimens, the characteristics of the rupture state of specimens, stress-temperature coupling, acoustic emissions, etc. The essence is that the specimens store different elastic strain energies with a difference of magnitude. The elastic strain energy is mainly used in the rupture of specimens; large size specimens and isometric granular texture specimens appear cutting ejection, also called rock burst, before rupture. On the contrary, small size specimens and porphyritic texture specimens do not appear cutting ejection before rupture, and the elastic strain energy is converted into acoustic energy which is used for increasing heat of specimens. The above performance of size effect under the stress plays an important role for research, the mechanism of rock burst, which is happened in deep underground surrounding rock, design and construction, the security maintenance, and the monitoring and prediction of earthquake.
XIAO-RUI ZHOU WEI GUO JUN-JIE LIU
Institute of Civil Engineering and Architecture, Dalian University Dalian 116622, China
国际会议
The 7th International Symposium on Rockburst and Seismicity in Mines(2009年第七届国际岩爆与微振动性学术研讨会)
大连
英文
255-260
2009-08-21（万方平台首次上网日期，不代表论文的发表时间）