论文部分内容阅读
针对由于地下开挖引起的岩石声发射率突增及最小主应力减小可能引起地震等地质现象，利用统计损伤理论对岩石破裂过程中声发射率的时间序列特征，特别是三维应力下岩石的快速加卸围压对声发射的影响进行了理论探讨。结果表明：三维应力下岩石快速卸围压，促使声发射率突增，而在一定范围内快速增加围压，声发射并不发生，只有增加一定轴压，才会有声发射的产生，这些结果在计算机上得到了很好的模拟，并与实验结果相吻合
In view of the sudden increase of rock acoustic emissivity and the decrease of minimum principal stress caused by underground excavation, geological phenomena such as earthquakes may be caused. Based on statistical damage theory, the time series features of acoustic emissivity during rock failure, especially the rock under three-dimensional stress The effects of rapid loading and unloading confining pressure on acoustic emission are discussed theoretically. The results show that the rapid unloading pressure of rock under three-dimensional stress promotes the rapid increase of acoustic emission rate. However, the rapid increase of confining pressure within a certain range does not occur. Acoustic emission does not occur only with a certain axial pressure. These results A good simulation was made on the computer and was in good agreement with the experimental results