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Title:: Study on the Relationship between Active Faults and Seismicity Based on the SOC Theory

作者:: 高召宁¹; 2; 姚令侃²; 杨庆华²; 齐颖²; (1.安徽理工大学能源与安全学院,安徽淮南 232001; 2.西南交通大学土木工程学院道路与铁道工程系,成都 610031)

Author(s):: GAO Zhao-ning¹; 2; YAO Ling-kan²; YANG Qing-hua²; QI Ying²; (1.School of Mining and Safety Anhui University of Science & Technology,huainan 232001,Anhui,China)(2.Civil Engineering College of Southwest Jiaotong University,Chengdu 610031,Sichuan,China)

摘要:: 通过对中国大陆及青藏高原、新疆、华北和东北各构造区的地震活动性的分析,论证了区域地震活动是一种自组织临界现象。利用分形理论中的粗视化网格法,研究了中国大陆以及各构造区断层系的分形特点和分形结构的跨尺度特征。开展了组构具有分形特点的沙堆模型实验。结合断裂力学理论,认为地震的自组织临界现象源于分形几何断层系的自组织临界性动力学过程,地震分维数和断层系分维数之间存在着一种正相关关系,明确了断层系分形和地震活动性分形之间的因果关系。在此基础上,提出了系统组构的分形是系统输出能量的分形的根源的观点,并进一步利用已有的观测资料进行了分析。最后,基于这个观点和区域断层分布可以通过常规的航卫片分析、地面调查和地质勘探等手段确定的事实,提出了利用断层的分维数与地震的分维数的相关关系,对区域地震的概率分布特征进行估计的观点,可为地震的预测预报提供参考。

Abstract:: By analyzing the earthquake activities in the tectonic regions of the Chinese mainland,Qinghai Tibet plateau,Xinjiang,north China,and northeast China,it was demonstrated that the regional earthquake is a kind of SOC phenomena.The fractal characteristics and trans-scale features of fractal structural of faults in Chinese mainland and tectonic regions were researched comprehensively with the macroscopic grid method in fractal theory.According to the experiments result of sand pile model with fractal features and the fracture mechanics,it was suggested that the SOC phenomena of earthquake is associated with the SOC dynamic process of fractal geometry faults.There is a positive correlation between the fractal dimension of faults and earthquake.The causal relation between faults fractal and earthquake fractal was clarified.Base on the preceding conclusions,a hypothesis was proposed that the system output energy fractal is based on the fractal structure of system.Further analysis was carried on with existing observation data.Finally,based on this hypothesis,and also the fact that the region faults distribution can be determined by aerial and satellite shot,ground survey and geologic exploration,it was proposed that the probability distribution of regional earthquake can be estimate with the positive correlation of the fractal dimension between faults and earthquake.The results can be helpful for earthquake prediction.