论文部分内容阅读
为有效提取岩土工程在循环载荷作用下岩体失稳破坏的前兆信息,基于岩样在循环载荷作用下有声发射、微震和电荷等多参量信号的异常变化特性,用多参量综合监测设备,同时监测岩石在循环载荷作用下变形破裂过程中的多参量信号。结果表明:在岩石循环加卸载的各个阶段,当载荷低于前一阶段最大载荷时,各通道多参量信号都较弱;而当载荷超过前一阶段最大载荷时,多参量信号迅速增多、增强,即岩石多参量信号的阶段性特征能反映岩石破坏信息及载荷状态。因此,对比分析多参量信号可较好地获得岩石失稳破坏的前兆信息。
In order to effectively extract the precursor information of rock failure under cyclic loading, based on the abnormal variation characteristics of multi-parameter signals such as acoustic emission, microseismicity and charge under the cyclic loading of rock specimen, At the same time, multi-parameter signals of rock during deformation and rupture under cyclic loading are monitored. The results show that when the load is lower than the maximum load of the previous stage, the multi-parameter signals of each channel are weaker in each stage of rock loading and unloading. When the load exceeds the maximum load in the previous stage, the multi-parameter signals increase rapidly and increase , That is, the phased characteristics of rock multi-parameter signals can reflect the rock damage information and load status. Therefore, the comparative analysis of multi-parameter signals can obtain the precursory information of rock failure.