水库诱震机制新理论的探索──断层带弱化与岩体软化效应诱震理论
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摘要
针对走滑断层诱发的水库地震，建立了尖点突变模型，提出了发震的充要力学条件判据及地震释放能量的简单表达式。以突变理论分析为依据，建立了水库诱震机制的新假说，简称为断层带弱化与岩体软化效应诱震理论，较合理地解释了水库地震与岩性、构造、水位的关系及水库地震序列ｂ值的特征。本文的讨论从整体上深化了对水库诱震机制的认识。
A cusp catastrophe model is constructed for the strike-slip fault earthquake, a necessary criterion for judgement of sufficient mechanical earthquake and a simple expression of released energy by earthuake are presented. Based on the catastrophe theory analysis,a new assumption, simply called theory on induced earthquake by fault zone weakening and rockmass softening, is sugested reasonably explaining the relation between reservoir-induced earthquake and rock types,structures,water level,and the characteristic of b value of reservoir-induced earthguake sequence.We have a clear knowledge of reservoir-inuced earthquake mechanism from this paper discussion
A cusp catastrophe model is constructed for the strike-slip fault earthquake, a necessary criterion for judgement of sufficient mechanical earthquake and a simple expression of released energy by earthuake are presented. Based on the catastrophe theory analysis,a new assumption, simply called theory on induced earthquake by fault zone weakening and rockmass softening, is sugested reasonably explaining the relation between reservoir-induced earthquake and rock types,structures,water level,and the characteristic of b value of reservoir-induced earthguake sequence.We have a clear knowledge of reservoir-inuced earthquake mechanism from this paper discussion
引文
［1］李祖武。关于水库地震几个问题的讨论。中国诱发地震。北京：地震出版社，1984，P42─48。［2］张倬元，王士天，王兰生。工程地质分析原理。北京：地质出版社，1981，P180─181。［3］陈。断裂力学在地震学中的应用第四讲。地震科学研究，1983，No4，P61─62。［4］秦四清，张倬元等。非线性工程地质学导引．成都：西南交通大学出版社，1993，P70─76。［5］沈立英等。弹性多孔介质中应力─孔隙压耦联理论在新丰江水库地震研究中的应用。中国地震，1992，8（3），P36─43。［6］邹学恭。水诱发地震与岩石力学。岩石力学的理论与实践、北京：水利出版社，1981，P298─320。
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