| 关于震源体物理意义的实验研究 |
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| 引用本文： | 张路,王威.关于震源体物理意义的实验研究[J].地震,1994(2):20-27. |
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| 作者姓名： | 张路 王威 |
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| 作者单位： | 国家地震局地壳应力研究所，国家地震局地质研究所，国家地震局地质研究所 中国北京 100085，中国北京 100029，中国北京 100029 |
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| 摘 要： | 运用固体传压介质岩石三轴试验装置模拟震源失稳振动过程，采取多点布设电阻应变片的方法，对试件突发失稳振动行为及其在试件－压机系统中的传播过程进行观测，测试结果为：应力振动的初动半周期平均约为０．１１ｍｓ，与岩石类型，周压及应力降等因素无关，振幅逐渐衰减；在试件－压机系统中，振动波从试件错动面处向外传播，其速度约为３．３０ｍ／ｍｓ；在失稳初动半周期内，振动波向试件以上传播的距离为３６３ｍｍ，传播的范围
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| 关 键 词： | 震源体 三轴压缩试验 物理意义 |
EXPERIMENTAL STUDY ON THE PHYSICAL IMPLICATION OF HYPOCENTER BODY |
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| Zhang Lu.EXPERIMENTAL STUDY ON THE PHYSICAL IMPLICATION OF HYPOCENTER BODY[J].Earthquake,1994(2):20-27. |
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| Authors: | Zhang Lu |
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| Abstract: | To simulate the hypocentral processes, the sudden instabilities and vibrations of rock specimen-testing machine system and the propagations of elastic waves were investigated by using a triaxial compression apparatus with solid confining medium and the multipoint strain gauging method. The results indicate that the initial semi-period of stress vibration is about 0.11ms on the average, which is independent of rock type, confining pressure stress drop, etc.; the elastic waves propagate from the slip plane of the specimen with a velocity of about 3.30 m / ms; and the wave propagation range within the initial semi-period is about 363mm that is only a small part of the system and corresponde to the range of hypocenter body. The study confirme that hypocenter body, as the source of seimic energy, is such a portion in the whole system that makes contibution to the slip instability and can be defined by the propagation range of elastic wave in the duration of seismic slip or by the rock body with dispalcement and velocity approximately greater than zero. |
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| Keywords: | Hypocenter body Triaxial compression test Sudden instability Multipoint strain gauging Initial semi-period Wave velocity |
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