Numerical simulation of rock progressive failure on samples with a pre-existed weak zone during brittle failure
JIAO Ming-ruo1,2) ZHANG Guo-min3) TANG Chun-an4) FU Yu-fang4) (1) Seismological Bureau of Liaoning Province, Shenyang 110031, China 2) Resource and Civil Engineering School, Northeastern University, Shenyang 110006, China 3) Center for Analysis and Pred
Considering the heterogeneity of geomechanical materials, seismicity during brittle rock failure under compressive loading on the sample with an original weak zone is simulated by using rock failure process analysis code (RFPA2D). The run-through process of weak zone, the forming of new fault and associated micro-seismicities are studied. The modeling demonstrates the total process of source development of earthquake from deformation, micro-failure to collapse and the behavior of temporal-spatial distribution of micro-seismicities. The stress, strain and the temporal-spatial distribution of micro-seismicities life-likely portrayed the phenomena of localization and temporal-spatial transitions, which is similar to those observed in our real crust. Also, the results obtained in simulations are in agreement with or similar to the reported experimental observations.