加载速率对岩石声发射信号影响的试验研究  

Experimental Study of the Influence of Loading Velocity on Rock's Acoustic Emission Signal

作　　者：梁忠雨[1] 高峰[2] 杨晓蓉[1] 冯叔忠[1] 蔺金太[1] 

机构地区：[1]军事交通学院基础部,天津300161 [2]中国矿业大学理学院,江苏徐州市221008

出　　处：《矿业研究与开发》2010年第1期12-14,95,共4页Mining Research and Development

基　　金：国家重点基础研究发展计划(973)项目(2002CB412705)

摘　　要：加载速率对岩石声发射信号的总体影响是巨大的。通过采集大理岩和红砂岩单轴压缩声发射信号,分析计算了不同加载速率下的声发射过程时间序列的参数,得到了声发射信号与加载速率的变化关系,结果表明,不同加载速率下的声发射信号特征具有明显的不同,随着加载速率的增大,能率和振铃率都随之增大,而产生的能量和振铃计数的总和却逐渐减少小,加载速率的不同,在某种意义上还会影响到岩石的破坏方式,加载速率越大,岩石的破坏越趋于剧烈。The loading velocity has powerful influence on rock＇s acoustic emission（AE）.Based on AE signal acquired by uniaxial compression experiment of griotte and red sandstone under different loading velocities,the time series parameters of the AE signal was calculated,and the relationship between AE signal and loading velocity was got.The results showed that the characteristics of AE signal was obvious different under different loading velocities,with the of loading velocity increasing,the energy rate and hit rate were becoming bigger,however the summation of energy and hit were becoming lower.Loading velocity also has a certain influence on the failure mode of rock,higher loading velocity is,more intense the damage of rock is.

关 键 词：岩体破裂 声发射 加载速率 信号采集 

分 类 号：TD313[矿业工程—矿井建设]