| 结构岩体变形、破坏与地震前兆关系的实验研究 |
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| 引用本文： | 李建国. 结构岩体变形、破坏与地震前兆关系的实验研究[J]. 地震地质, 1980, 2(1): 11 |
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| 作者姓名： | 李建国 |
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| 作者单位： | 国家地震局地质研究所岩石力学实验室 中国科学院盐湖研究所岩石力学研究室 |
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| 摘 要： | 本文主要以岩石试件切口在单轴压缩条件下的扩张来模拟大陆内部断层端部扩张型地震的孕育过程。在实验中观测了试件在外力作用下的应力-应变关系、张裂纹和剪切破坏在时间和空间上的扩展顺序,以及由此引起的声发射和纵波走时变化特征。根据实验结果讨论了由断层端部扩展引起地震的前兆——如断层蠕滑、前震迁移路径、地下水和地形变等各类地震前兆上显示的差异性,对于观测前兆和前震区与主震区的相对位置,具有一定的指导意义
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| 关 键 词： | 结构岩体 断层端部 声发射 地震前兆 纵波走时 张破裂 应力一应变 大理岩 压缩区 完整岩石 |
EXPERIMENTAL STUDIES ON THE PROCESSES OF DEFORMATION AND FAILURE OF A TYPICAL ROCK MASS AND THEIR RELATIONSHIP TO BOTH THE SEISMIC PRECURSORS AND THE FORESHOCKS |
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| Abstract: | This paper deals especially with the propagation of a 2mm thick saw-cut inclined 45° to the axis of the rock specimen of 5×5×12.5cm and filled with epoxy so as to simulate the development of an earthquake of continental interior. The specimen was loaded in uniaxial compression and attached with a measuring system consisting of strain gages, acoustic emission and wave travelling.Characteristics of failure modes observed in this experimental studies were as follows:1. Creep along the fault face oc |
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