岩石声衰减粘弹性及缺陷检测  

Viscoelasticity Analysis of Acoustic Attenuation in Rock and Flaw Detection

作　　者：陈耕野[1] 李造鼎[1] 金银东[1] 

机构地区：[1]东北工学院采矿系

出　　处：《东北工学院学报》1993年第3期221-225,共5页

基　　金：国家教委博士点基金

摘　　要：对岩石声衰减机制进行线粘弹模型分析,给出衰减系数α与粘滞系数η关系式;对含模拟夹层的岩石、混凝土进行声衰减和波速测量。并用参数下降率作为判断缺陷的一个依据。在本文条件下.Q_P下降率大于Γ_p下降率的2倍。采用衰减计算固化程序处理数据。A linear viscoelasticity model for the acoustic attenuation mechanism in rock has been analysed with a relationship between attenuation coefficient a and viscosity coefficient η given. The acoustic attenuation and wave velocity in rock and concrete containing simulated sandwiched-in structure were measured.taking the descending rate of parametaes as a criterion to ascertain a flaw coming into existence. Under the conditions described in this paper, the descending rate of Qp is greater than twice as large as that of vp . A firmware program for attenuation computation is used in data processing.

关 键 词：岩石缺陷 声衰减 粘滞性 

分 类 号：P631.5[天文地球—地质矿产勘探]