摘要
使用真三轴压机模拟了水平或缓倾斜矿体采场间柱的受力状态,研究了在这种应力状态下岩石破坏过程中超声波衰减的特性。采用不同时刻频谱比法和标准试块频谱比法计算了岩石的品质因数Q_P值,给出了Q_P值在不同极限应力状态下的实验数据,并对穿过岩石试件的P波进行频谱分析,讨论了超声波在岩石中的衰减机制。
With a true triaxial compressive testing machine we imitate the stress of interchamber pillar of level and lightly pitching orebody, and study the characteristics of ultrasonic attenuation during the crack process of a rock specimen under the stress of that. The rock quality factor Q is computed with spectral amplitude ratio method of model sample and different time. The data for Q, as a function of differential pressure are given. This paper analyses spectrums of P waves through the specimen, and also deals with attenuation mechanism of ultrasonic waves in rock.
