【摘要】 为了研究不同层理倾角加锚岩石变形破坏过程中的声发射特征,加工制备了0°和90°两种层理的加锚试样,利用RMT-150C岩石力学试验机和AEwin-USB型声发射信号采集系统,进行了含层理加锚岩石声发射特征试验。研究表明:单轴压缩条件下,90°层理试样声发射累积振铃计数大于0°层理试样,具有明显的层理效应;加锚试样相比无锚试样,在压密阶段就有较强声发射信号产生,而且随着载荷的增加声发射信号越来越强,加锚试样的累计振铃计数大于无锚试样;声发射信号特征可以反映岩石内部裂隙扩展变化,对于揭示层理加锚围岩破坏失稳机制具有一定的参考价值。更多还原

【Abstract】 In order to study the acoustic emission(AE) characteristics of different layered angle and anchored rock deformation and failure process,the anchored samples of 0°and 90°two layers were processed. The RMT-150 C rock mechanic test machine and AEwin-USB AE signal acquisition system were used to test AE characteristics of the layered and anchored rock. The results show that under the condition of uniaxial compression,the AE cumulative ringing count of the 90°layered sample is greater than 0°layered sample,and it has a signi?cant bedding effect. Compared with non-anchored sample,anchored sample have stronger AE signals during compaction stage,and the AE signals become stronger as the load increases. The cumulative ringing count of anchored sample is also greater than nonanchored sample. The characteristics of AE signals can re?ect the variation of crack propagation inside the rock,which has certain reference value for revealing the failure mechanism of layered and anchored surrounding rock.更多还原