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| 基于高温高压岩石破裂实验结果对中强地震前震中附近区域部分地震学现象的初步解释 | |
| 引用本文： | 蒋海昆,张流,周永胜,侯海峰,晁文海.基于高温高压岩石破裂实验结果对中强地震前震中附近区域部分地震学现象的初步解释[J].西北地震学报,2002,24(2):113-122. |
| 作者姓名： | 蒋海昆 张流 周永胜 侯海峰 晁文海 |
| 作者单位： | 1. 山东省地震局,山东,济南,250014;中国地震局地质研究所,北京,100029 2. 中国地震局地质研究所,北京,100029 3. 山东省地震局,山东,济南,250014 |
| 基金项目： | 中国地震局“十五”科技攻关计划 0 1- 0 4 - 0 1项目资助 |
| 摘 要： | 依据高温高压岩石破裂实验结果并结合理论分析，对 附近区域不同深度温压条件下岩石变形破坏性质及破坏失稳的力学行为进行了研究，在一次应力加载循环中，发生破坏的部位随时间具有向深部下迁的趋势。考虑到深度温压条件下岩石的渐进式破坏行为及突发失稳，对主震前震中附近区域小地震活动的增强、平静、活化等现象，以及b值等时间序列参数变化的可能机理进行初步探讨，并简单讨论了两类平静和两类b值变化的可能原因。 |
| 关 键 词： | 岩石强度 差应力 突发失稳 渐进式破坏 震源深度 |
| 文章编号： | 1000-0844(2002)02-0113-10 |
| 收稿时间： | 2001/5/23 0:00:00 |
| 修稿时间： | 2001年5月23日 |
PRIMARY EXPLANATION ON SOME SEISMIC PHENOMENA AROUND THE EPICENTER AREA BEFORE STRONG AND MODERATE EARTHQUAKE BASED ON THE HT -HP ROCK FAILURE EXPERIMENTAL RESULTS |
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| JIANG Hai-kun,ZHANG Liu,ZHOU Yong-sheng,HOU Hai-feng and CHAO Wen-hai.PRIMARY EXPLANATION ON SOME SEISMIC PHENOMENA AROUND THE EPICENTER AREA BEFORE STRONG AND MODERATE EARTHQUAKE BASED ON THE HT -HP ROCK FAILURE EXPERIMENTAL RESULTS[J].Northwestern Seismological Journal,2002,24(2):113-122. | |
| Authors: | JIANG Hai-kun ZHANG Liu ZHOU Yong-sheng HOU Hai-feng and CHAO Wen-hai |
| Institution: | JIANG Hai kun 1,2,ZHANG Liu 2,ZHOU Yong sheng 2,HOU Hai feng 1,CHAO Wen hai 1 |
| Abstract: | Based on the model from HT -HP rock experimental result and theoretical analysis, for epicenter area of strong and moderate earthquake, the properties and mechanical behaviors of rock deformation and failure under the condition of different temperature and pressure are studied. According to the model, during a loading circle, the small earthquakes move to the deeper crust gradually with the tectonic stress increases. The relocation results of some earthquake sequences support this concept model. Considering the mechanical behaviors of rock incremental failure and abrupt instability, the enhancement and quiescence phenomena of seismic activity before middle and strong earthquake, as well as the changing characteristics of b -value are studied primarily. The potential mechanism of two kinds of quiescence and change of b -value are discussed. |
| Keywords: | Rock strength Differential stress Abrupt instability Incremental failure Focus depth |
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