岩石中裂隙损伤对超声波衰减影响的实验研究  

Experimental study on the effect of the crack damage on ultrasonic wave attenuation in rocks

作　　者：陈耕野[1] 李造鼎[1] 刘斌[1] 

机构地区：[1]东北大学

出　　处：《黄金》1995年第2期15-20,共6页Gold

摘　　要：在分析岩石裂隙损伤声衰减基础上，形成了损伤参量Ｄ与衰减系数α的关系式，建立了表达缺陷尺度与数量分布特征的裂隙集合。运用能量法进行了玄武岩试件损伤声衰减与应力关系的实验研究。结果表明，品质因数下降量ＡＱ＿ｐ随应力比率＜σ＞变化的线性斜率ｔｇａ＿１，能够用来反映岩石裂隙损伤繁衍的规律。本文还对工程岩体声衰减检测应用进行探索。Based on the analysis of the ultrasonic wave attenuation of crack damage in rocks,the connection of damage parameter D with attenuation coefficient a has been formulated.The crack set has been formed,by which the distribution character of flaw length and quantity can be expressed.Experiments to study the relationship bstween acoustical attenuation with damage and stress have been conducted in basalt using the energy method.The results have shown that tile multiply law of crack damage in rock can be reflected from the linear slope of quality factor decrement ΔQ_p changing with the stress ratio<σ>.This paper still explores the application of acoustic waveattenuation detection in engineering rock mass.

关 键 词：岩石 裂隙损伤 声波衰减 品质因数 

分 类 号：P585[天文地球—岩石学]