高温作用下花岗岩声发射特性试验研究[EB/OL]
北京：中国科技论文在线
研究表明: 20 ℃～60 ℃黑云母花岗岩的声发射最大AE能率随着温度升高而增加
通过MTS815 Flex Test GT 岩石力学试验系统和PCI-Ⅱ声发射仪研究了不同围压下在20 ℃～130 ℃ 范围黑云母花岗岩（φ50mm×100mm）的三轴压缩试验过程声发射变化规律及特性
局部塑性破坏造成大量低能量释放率的声发射产生
the evolution of the acoustic emission of biotite granite sample(φ50 mm×100 mm) within the temperature range from 20 ℃ to 130 ℃ under different stress and the cracking characteristics of the rock as manifested by the acoustic emissions in each stage were analyzed by MTS815 Flex Test GT rock mechanics test system and PCI-Ⅱ AE system and discussed based on experiments．It is shown in this research that form 20 ℃ to 60 ℃ the maximum AE energy of AE events of biotite granite continuously increase and the characteristics of brittle failure gradually strengthen, macroscopic failure angle gradually decrease, failure modeling from shear failure transition to tensile failure; form 60 ℃ to 130 ℃ the maximum AE energy of AE events of biotite granite have been reduced and the characteristics of brittle fracture gradually weaken
60 ℃～130 ℃声发射最大AE能率随着温度升高而减小
成都 610059
声发射密集区由小部分能量率很大的声发射和数量很多、低能量释放率的声发射组成
it starts to appear a local plastic deformation and failure, macroscopic failure angle gradually recrease and the characteristics of tensile failure gradually strengthen
When the biotite granite sample is heated to 60 ℃
