康宗欣^*

（  中国矿业大学力学与建筑工程学院；  ）

摘要： 通过岩石单轴声发射实验，得到了较好的岩石应力-声发射曲线。利用基于时间序列的关联函数算法，计算了不同应力阶段的声发射时间序列的关联维数。结果表明，加载初期的声发射关联维数呈增大趋势，在应力达到80%-90%之间时，声发射关联维数开始下降，在达到破坏应力时达到最小值.这表明岩石声发射很好的反映了岩石内部损伤演化信息，岩石声发射关联维数的降低预示着岩石的破坏失稳。
关键词： 声发射；分形；单轴压缩；失稳

KANG Zongxin^*

（  Shool of Mechanics and Architecture Engineering,China University of Mining and Technology；  ）

Abstract： Cures of rock stress-acoustic emission under uniaxial compression were obtained by analysing the experimental data。Relevant dimensions of acoustic emissions on different stress levels were calculated by using relevant function arithmetic. The results showed that relevant dimensions growed at the initial loading state, when stress was between 80%-90% level, relevant dimension began to fall, and reached minor values when stress achieved fracture level. It predicted that rock acoustic emission imaged the rock damage evolution and the reduction of relevant dimension indicated rock fracture.

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