含孔花岗岩破裂过程不同区域声发射特征

利用孔洞对声发射(AE)传播的阻隔作用，对AE探头监测区域进行分区.通过含孔花岗岩双轴加载破坏过程的AE多通道监测实验，研究了岩石变形破坏过程不同区域AE特征及其与破坏模式之间的关系.结果表明:试件的AE探头监测区域分为独测区、共测区、盲测区;试件共有两种破坏形式，“V”型和贯穿型;对于“V”型破坏的试件，主破裂发生在独测区，各通道的AE特征明显不同;对于贯穿型破坏试件，主破裂发生于共测区，各通道的AE特征较为相近.

Acoustic Emission Characteristics of Different Areas in the Fracture Process of Perforated Granite

The monitoring area of acoustic emission(AE)probes was partitioned by means of the blocking effect of hole on AE propagation. Based on the multi-channel AE monitoring experiment on perforated granite specimen under biaxial loading， the AE characteristics of different areas of specimens in failure process and its relationship with the failure mode were studied. The results show that AE sensors monitoring area of the specimens can be divided into three kinds， the single monitoring zone， the joint monitoring zone， and the blind monitoring zone. There are two kinds of fracture forms， the "V" type and the penetration type. For the specimens with V-type fracture， the main ruptures occur in the single monitoring zone and the AE characteristics of each channel are significantly different. For the specimens with penetration type fracture， the main ruptures happe in the joint monitoring zone and the AE characteristics of each channel are similar.