岩石非均匀性对地震活动状态影响的数值模拟研究  

The Numerical Simulation of the Affection of the Seismic State Variation Due to Rock Heterogeneity

作　　者：李志雄[1] 陶本藻[1] 焦明若[2] 路鹏[3] 李圣强[4] 吴婷[4] 泽仁志玛[4] 

机构地区：[1]武汉大学测绘学院 [2]辽宁省地震局,沈阳110031 [3]防灾科技学院,燕郊065201 [4]中国地震局地震预测研究所,北京市复兴路63号100036

出　　处：《中国地震》2007年第4期375-382,共8页Earthquake Research in China

基　　金：地震科学联合基金资助项目(项目编号:A07007)

摘　　要：地震的孕育、发生与震源位置及其岩石力学性质有着密切的联系,本文借助数值模拟方法研究了岩石均质度在岩样变形直至破裂过程中对声发射事件活动状态的影响。数值模拟结果表明,岩石非均匀性对岩样声发射活动状态的时间演化过程有着较大影响,所得结论进一步支持了分区研究强地震前兆异常的必要性。The authors investigate the affections of the seismic state variation during the process of earthquake prognancy especially at a period of rock deformation prior to the fracture due to rock heterogeneity by means of the numerical simulation because of the fact that the pregnancy and occurrence of the earthquake have close relation with the location of the earthquake and the material around it.The results of the simulation show that the rock heterogeneity can affect the sequence of the acoustic emissions greatly,leading to the variation of seismic state before the fracture.The conclusion supports the necessity of studying precursory features based on the different geological areas.

关 键 词：岩石非均匀性 地震活动状态 数值模拟 地震预测 

分 类 号：P315[天文地球—地震学]