摘要
通过对几种岩样破裂时声发射数据的分析,研究了声发射参数之间的相互关系,发现岩石本构关系与岩石的声发射之间存在的一种必然联系。通过多种试验参数的图形拟合,分析了声发射活动的规律。将求得的分维和声发射参数随时间的变化曲线进行了对照,结果表明,分维和声发射参数随时间的变化趋势存在相关性。分形维数不仅可以表征声发射的频度,而且分维最小值往往预示着一个大破裂的发生。
The relation among acoustic emission parameters is studied through the analysis of the acoustic data of several rock samples in breakage. It is found that there is an inevitable relation between rock structure and its acoustic emission. The law of acoustic emission activity is analyzed by graphic fitting of various test parameters and the curves of the time-related change of fractal dimension and of the acoustic parameters are compared. The result indicates that there is a correlation between the time-related change trends of fractal dimension and the acoustic emission parameters. Not only can the fractal dimension characterize the frequency of acoustic emission but its least value often predicts a large breakage.
出处
《金属矿山》
CAS
北大核心
2008年第11期133-136,共4页
Metal Mine
基金
973国家重点基础研究发展规划项目(编号:2002CB412705
2002CB412707)
国家创新群体项目(编号:50221402)
国家自然科学基金项目(编号:50579042)。
关键词
声发射参数
破裂
损伤因子
分维
Acoustic emission parameter,Breakage,Damage factor,Fractal dimension
