| 岩石破裂中多裂纹辐射模型 |
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| 引用本文： | 郭子祺,郭自强.岩石破裂中多裂纹辐射模型[J].地球物理学报,1999,42(Z1):172-177. |
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| 作者姓名： | 郭子祺 郭自强 |
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| 作者单位： | 1. 中国科学院遥感应用研究所 北京 100101;
2. 中国科学技术大学北京研究生院地学部 北京 100039 |
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| 摘 要： | 以往有关岩石破裂过程中产生的电磁辐射（EM）理论均建立在单裂纹模型之上,但实验表明,岩石破裂中存在着多裂纹同步扩展的现象,因而存在多裂纹同步扩展产生的电磁辐射。根据实验结果,提出了多裂纹同步扩展的简化辐射模型,计算了电磁辐射场的特性。结果表明,这种电磁辐射比单裂纹辐射场强振幅大N倍和具有更强的方向性,用实验测量值与该模型的计算值进行了比较,二者基本吻合。
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| 关 键 词： | 岩石破裂 电磁辐射 多裂纹模型 |
| 收稿时间： | 1999-04-28 |
A MODEL OF ELECTROMAGNETIC EMISSIONS FROM MULTICRACKING EXTENSION DURING ROCK FRACTRE |
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| GUO ZI-QI GUO ZI-QIANG.A MODEL OF ELECTROMAGNETIC EMISSIONS FROM MULTICRACKING EXTENSION DURING ROCK FRACTRE[J].Chinese Journal of Geophysics,1999,42(Z1):172-177. |
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| Authors: | GUO ZI-QI GUO ZI-QIANG |
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| Institution: | 1. Institute of Remote Sensing Application ,Chinese Academy of Sciences,Beijing 100101 .China;
2. Graduate School in Beijing ,University of Science and Technology of China, Beijing 100039 ,China |
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| Abstract: | All theories of electromagnetic emission （EM） related to rock crack were based on the model of the single-crack extension in the past. Experiments indicted that the simultaneous extension of multi-crack exists during rock crack. Thus there is electromagnetic emission not only in single-crack but also in multi-crack extension in crack of rocks. We propose the model of electromagnetic emission from multi-crack simultaneous extension based on the experimental phenomenon. Using this model, the electromagnetic field of EM has been calculated in the simple condition. Our result show that the emission and property of EM is different from single crack. Its amplitude is N times that of latter and its emission direction is stronger. In comparison with the experimental recorded value,we find the maximal value of EM calculated by the model almost coincide with it. |
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| Keywords: | Electromagneticemission Rockcrack Multi-crackextension |
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