岩石压剪断裂核与板块内部地震

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摘要在中国大陆内部发生的地震属于地球板块内部地震。它的发震机制是在应力作用下，原有断层裂面端部形成特殊形状的岩石破碎区——岩石压剪断裂核而导致断层扩展。该模式已被单江震源地质遗存所证实，且理论、试验、遗存一致，微观、宏观相符。通过试验研究，取得岩石压剪强度、岩石破碎后的扩容与膨胀应力、压剪断裂判据、压剪断裂试验过程中闭合裂缝面应力向缝端转移及断裂前闭合裂缝面出现开位等系列结果。根据岩石压剪断裂核模式分析，压剪断裂核内岩石破碎先于地震发生，衍生热红外等诸多现象，在临震前显现异动。因此，板内地震的发生具有可预测性。

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关键词 ：岩石力学, 板内地震, 岩石压剪断裂核, 临震预测

Abstract：The earthquakes in China?s mainland belong to intraplate earthquakes. The seismogenic mechanism is that the rocks break zone with special shape—rock compression and shear fracture nucleus forming by the end of original fault cause the fault expansion，under the action of the stress. The model has been confirmed by geological remains of earthquake source in Danjiang. Theory is consistent with experiment results and geological remains，and same for micro and macro phenomena. By laboratory studies，series results such as rock strength of compression and shear，dilatancy and expansive stress after rock broken，compression-shear fracture criterion，closed cracks surface stress transferring to the ends of the cracks and closed crack surface appearing opening displacement before fracture in the process of compression and shear fracture test，are all obtained. According to the rock compression and shear fracture nucleus mode analysis，rock breaking in the compression shear fracture nucleus takes place before the earthquake，deriving thermal infrared and many other phenomena. Abnormal change appears before the impending earthquake. Therefore，intraplate earthquakes are predictable.

Key words： rock mechanics intraplate earthquakes rock compression and shear fracture nucleus impending earthquake prediction

收稿日期: 2011-04-01

引用本文:

周群力，刘振洪，刘樵，刘清波. 岩石压剪断裂核与板块内部地震[J]. 岩石力学与工程学报, 2011, 30(12): 2474-2480.
ZHOU Qunli，LIU Zhenghong，LIU Qiao，LIU Qingbo. ROCK COMPRESSION AND SHEAR FRACTURE NUCLEUS AND INTRAPLATE EARTHQUAKES. , 2011, 30(12): 2474-2480.

链接本文:

http://www.rockmech.org/CN/Y2011/V30/I12/2474

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