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在单轴压缩条件下,分别研究分析了天然含水、浸水饱和和施加渗流岩石的声发射特性。研究表明:在低应力阶段,渗流不能引起AE活动,一般在单轴压力达到岩石强度的60%~80%,临近破坏时,加渗流和停止渗流的瞬间均会产生较大的AE事件,从稳定渗流到停止渗流一般接收不到明显的AE信号;岩石在荷载作用下的变形破裂特性与该过程中的声发射现象紧密相关。从平均意义的能量和形变角度分析,得出平均能量和平均形变在试件破裂过程中的变化是同步的,浸水饱和岩石较天然含水岩石的平均能量小、平均形变大的结论,并根据岩石破裂损伤机理给以解释。
Under the condition of uniaxial compression, the acoustic emission characteristics of natural water, saturated water saturation and percolation rock were studied. The results show that in the low stress stage, the seepage can not induce the AE activity. Generally, when the uniaxial pressure reaches 60% -80% of the rock strength, near the failure, the larger AE event will occur at the moment of seepage and stoppage of seepage The steady seepage to stop seepage generally can not receive obvious AE signal. The deformation and rupture characteristics of rock under load are closely related to the acoustic emission phenomenon in this process. From the mean energy and deformation perspectives, it is concluded that the mean energy and mean deformation are in synchronicity during the rupture of the test piece. The average energy of the submerged saturated rock is smaller than that of the natural water-bearing rock and the mean deformation is large. Based on the conclusion that rock The mechanism of rupture damage is explained.