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利用离散元颗粒流软件模拟了岩石单轴压缩破坏过程,采用内嵌FISH语言,通过设置随机缺陷来建立不同均质度的岩石数值试样对岩石的声发射规律进行了研究。结果表明,不均质度对于岩石声发射特性有着重要影响,随不均质度的增加,试样的峰值强度下降,声发射总数大幅增加,空间分布也更为分散,声发射出现时间更早,持续时间更长,峰值后的声发射保持更高的强度;单轴应力状态下声发射最大强度出现时间相比峰值破坏时间有不同程度滞后,不均质度越高,滞后效应越明显,显示岩石破坏要早于声发射峰值出现时间。
Discrete particle flow software is used to simulate the rock uniaxial compression failure process. By using embedded FISH language, the rock acoustic emission law is established by setting random flaws to establish rock sample with different homogeneity. The results show that the heterogeneity has an important influence on the acoustic emission characteristics of rock. With the increase of heterogeneity, the peak intensity of the sample decreases, the total number of acoustic emission increases greatly, the spatial distribution is more dispersed, and the acoustic emission occurs earlier , The duration is longer and the acoustic emission after the peak maintains a higher intensity; the maximum intensity of acoustic emission in uniaxial stress state lags behind the peak failure time in different degrees, the higher the heterogeneity is, the more obvious the hysteresis effect is, Show rock destruction earlier than acoustic emission peak appearance time.