大理岩受压声发射研究

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%左右、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。

Research on AE characteristics of marble with different water content

Under uniaxial compression,acoustic emission (AE) characteristics were researched and analyzed through experiments on natural rock,saturated rock,and seepage-loading rock respectively.The experiment result shows that in the phase of low stress,seepage can't cause AE until uniaxial compression reaches 60%-80% of rock strength.Great AE signals can be received at the moments of starting seepage and stopping seepage near breach of the rock.Generally,during the stage from stable seepage to stopping seepage obvious AE signals can't be received.Rock deformation and failure under loading are related to AE phenomenon closely,that's to say averaged energy and averaged deformation are synchronous during failure process of rock mass.The conclusions are derived that the saturated rock's averaged energy is less than that of natural rock,but its averaged deformation is lager,and the conclusions are explained according to the mechanism of rock breach.