Microseismic Monitoring and Numerical Simulation of Rock Slope Failure
Microseismic Monitoring and Numerical Simulation of Rock Slope Failure
复制标题
岩质边坡破坏微震监测与数值模拟
DOI：
10.1155/2013/845191
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发表时间：
2013-01-01
影响因子：
2.3
通讯作者：
Tang, Chunan
中科院分区：
文献类型：
--
作者：
Liang, Zhengzhao;Xu, Nuwen;Tang, Chunan
建立了一个弹脆性破坏模型的数值程序，用于模拟岩石破坏问题中的地震活动。数值模拟了岩石破坏监测与预测原理上的可行性。非均匀性被认为是边坡失稳前兆存在的主要原因。在非均质岩石中可以观察到地震同相轴，而在均质岩石中则表现为突变破裂模式，没有任何早期地震前兆。采用重力增量法（离心加载法）对某边坡的破坏过程进行了数值模拟，并介绍了微地震监测系统在该边坡中的应用。数值模拟结果表明，滑坡是由主要断裂的断裂引起的，滑坡前断裂中的非均匀性引起的微破裂可以被认为是滑坡的前兆，这些微破裂被微地震监测系统捕捉到。结果表明，微地震监测技术在预测边坡破坏方面是成功的，数值模拟结果将有助于解释微地震监测结果。
A numerical code with an elastic-brittle failure model has been developed to simulate the seismic activities in rock failure problems. The feasibility in principle of monitoring and prediction of rock failure was numerically simulated. The heterogeneity was considered to be the main reason for the existence of slope failure precursors. Seismic events could be observed in heterogeneous rock, whereas the homogeneous rocks showed an abrupt fracture mode without any early seismic precursors. The failure process of a slope was numerically investigated by using a gravity increase method (centrifugal loading method), and the application of the microseismic monitoring system in the slope was introduced. The numerical results showed that the fracture of the main faults caused the slope slide, and the microcracking caused by the heterogeneity in the faults prior to the landslide could be considered as the precursors of the slope failure, which were captured by the microseismic monitoring system. The microseismic monitoring technique was proved to be successful in predicting the failure in the slope, and the numerical results will be helpful in interpreting the microseismic monitoring results.