| 岩石细观破裂的实验观测研究及其对认识地震活动性的启示 |
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| 引用本文： | 赵永红,黄杰藩.岩石细观破裂的实验观测研究及其对认识地震活动性的启示[J].地球物理学报,1995,38(5):627-636. |
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| 作者姓名： | 赵永红 黄杰藩 |
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| 作者单位： | 北京大学地质学系, 北京 100871 |
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| 基金项目： | 国家自然科学基金，国家教委优秀年轻教师基金 |
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| 摘 要： | 对合一条预制中心割缝的大理岩六边形试件进行了对边均匀加压实验，在扫描电镜下实时观测了细观裂纹的起裂、扩展过程，研究了它们与外载大小和方向之间的关系．用实验过程中拍摄的显微照片测量与计算了裂端距（割缝周围次级裂纹开裂点至割缝端点的距离）与外载方向之间的关系，并分析了当加载方向变化时裂纹扩展的特征及变化规律．最后将实验结果与滇西北洱源－鹤庆断裂尾端张性盆地的发育过程做了对比，发现两者在受力方向改变时，次级断层的发育过程具有相似之处．
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| 关 键 词： | 扫描电镜实时观测 岩石细观破裂 地震活动性 |
| 收稿时间： | 1994-03-11 |
EXPERIMENTAL STUDY OF MESO-FRACTURES IN ROCK AND ITS IMPLICATION FOR UNDERSTANDING SEISMIC ACTIVITIES |
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| ZHAO YONG-HONG,HUANG JIE-FAN,HOU JLAN-JUN,WANG REN.EXPERIMENTAL STUDY OF MESO-FRACTURES IN ROCK AND ITS IMPLICATION FOR UNDERSTANDING SEISMIC ACTIVITIES[J].Chinese Journal of Geophysics,1995,38(5):627-636. |
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| Authors: | ZHAO YONG-HONG HUANG JIE-FAN HOU JLAN-JUN WANG REN |
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| Affiliation: | Department of Geology, of Geology, Pecking University, Beijing 100871 |
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| Abstract: | Uniaxial compression tests of marble plates cut as regular hexagon specimens containing a central slot were conducted under direct SEM observation. The initiation,propagation, opening and closure of cracks accompanying the increase of stress level and the change of loading direction throughout the whole test process were monitored.From the photographs taken at different stages of fracture development and for different directions of loading,the relationships between the crack to slotend distance and the direction of loading and between the crack length and stress level are analysed. A better understanding of the fracture characteristics of rock materials has been achieved. Finally,a prelimenary comparison between the rest results and the development of Eryuan-Heqing tensail basin in Northwestern Yunnan are conducted. |
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| Keywords: | SEM observation Meso-fractures in rock Seismic activities |
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