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| Numerical simulation of rock progressive failure on samples with a pre-existed weak zone during brittle failure | |
| 作者姓名： | 焦明若 张国民 唐春安 傅宇方 |
| 作者单位： | 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 |
| 基金项目： | The Development Program on National Key Basic Researches under the Project Mechanism and Prediction of Continental Strong Earthquakes (G19980407)，State Natural Science Foundation (49974009). |
| 摘 要： | Introduction Finite element method has a wide application in analyzing the crust tectonic stress field and tectonic deformation field. WANG, et al (1980), for example, reversed the crust stress field and forecast future seismic risky area using finite element way. WANG and CHEN (1980) made the numerical simulation on modern tectonic stress field for China and its adjacent area using finite element and obtained the whole picture of tectonic stress filed in China. Except analyzing the tect… |
Numerical simulation of rock progressive failure on samples with a pre-existed weak zone during brittle failure* |
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| JIAO Ming-ruo, ZHANG Guo-min TANG Chun-an FU Yu-fang.Numerical simulation of rock progressive failure on samples with a pre-existed weak zone during brittle failure[J].Acta Seismologica Sinica(English Edition),2002,15(1). | |
| Authors: | JIAO Ming-ruo ZHANG Guo-min TANG Chun-an FU Yu-fang |
| Institution: | 1. Resource and Civil Engineering School, Northeastern University, Shenyang 110006, China;Seismological Bureau of Liaoning Province, Shenyang 110031, China 2. Center for Analysis and Prediction, China Seismological Bureau, Beijing 100036, China 3. Center for Rockbursts and Induced Seismicity Research, Northeastern University, Shenyang 110006, China |
| Abstract: | 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. |
| Keywords: | pre-existed weak zone rock failure micro-seismicity numerical simulation |
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