铁道科学与工程学报2016，Vol.13Issue(8)：1528-1534,7.
单轴压缩及劈裂条件下岩石的声发射特性试验研究
Experimental study on AE characteristics of rocks under Brazilian and uniaxial compression
摘要
Abstract
By virtue of INSTRON electro-hydroulic servo universal testing machine and PCI-2 acoustic emission testing system,uniaxial compressive and Brazilian tests were carried out with 3 different rocks.The results show that in uniaxial compression test AE energy rate of surrounding rock and unweathered orebody are respectively concentrated in the middle-late period of elastic phase and elastic phase,but both significantly decreased in the plastic phase.The AE energy rate of lightly weathered orebody is rich all the time and its’accumulated AE counts and energy are highest while unweathered orebody’s are lowest in uniaxial compression test.In Brazilian test,the changes over time of AE energy rate are in accordance with the changes of stress,which shows that AE energy rate indicates the change trend of damage inside rock.The accumulated AE counts and energy of rocks under uniaxial compression are much higher than those of rocks under Brazilian splitting.关键词
岩石/单轴压缩/劈裂/声发射Key words
rock/uniaxial compression/Brazilian splitting/acoustic emission分类
建筑与水利引用本文复制引用
向天元,谢学斌,周瀚..单轴压缩及劈裂条件下岩石的声发射特性试验研究[J].铁道科学与工程学报,2016,13(8):1528-1534,7.基金项目
国家自然科学基金资助项目（51374246）；湖南省科技划项目 （）
