单轴压缩试验下包裹及未包裹岩石声发射特性研究  

Research on acoustic emission characteristics of wrapped and unwrapped rock based on uniaxial compression test

作　　者：姜亮亮[1] 朱志成[1] 赵奎[1] 冯萧[1] 黄超[1] 

机构地区：[1]江西理工大学资源与环境工程学院,江西赣州341000

出　　处：《江西理工大学学报》2015年第3期25-29,共5页Journal of Jiangxi University of Science and Technology

基　　金：国家自然科学基金资助项目(51304083)

摘　　要：单轴压缩试验条件下,通过对能率及比值(事件率/能率)这两个声发射特征参数的研究,发现包裹与未包裹岩石声发射特性存在明显差异.其差异主要表现在:1包裹岩石在整个加载过程中存在两个声发射能率突增点,分别代表外部包裹体部分破裂及内部岩石破坏;而未包裹岩石仅出现一个声发射能率突增点,代表内部岩石破坏;2在声发射事件率与能率的比值方面,包裹岩石在整个加载过程中出现了两次"峰值",而未包裹岩石仅出现了一次"峰值".Under uniaxial compression test, significant differences in acoustic emission characteristics were found between wrapped and unwrapped rock through the study of characteristic parameters of energy rate and specific value （the ratio of event rate and energy rate）. There are two sharp points of energy rate of acoustic emission of wrapped rock, indicating the failure of outer layer of concrete and internal rock during the entire loading test. However, there is only one point of energy rate of acoustic emission of unwrapped rock, indicating the failure of internal rock. The ratio of the acoustic emission event rate and the energy rate of wrapped rock presented ＂peak value＂ two times. However, unwrapped rock presented ＂peak value＂ only one time during the loading.

关 键 词：包裹岩石 单轴压缩试验 声发射特性 声发射能率 峰值 

分 类 号：TD315[矿业工程—矿井建设]