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| 1 | 基于动力系统结构稳定性的共轭剪切破裂-地震复合模型显示文摘地壳中岩体破坏、断层形成与地震诱发具有成因联系,其中“X”型共轭剪切破裂与地震发生关系密切。为此,基于动力系统结构稳定性理论和孔洞岩体蝶形破坏理论,构建了“X”型共轭剪切破裂-地震复合模型,推导了破裂尺寸计算公式,给出了地震释放能量的计算方法。用动力系统理论解释了破裂扩展尺寸与地震能量释放存在的定量对应关系,从理论上完整阐述“X”型、“V”型和“Y”型共轭破裂特征的生成及演化力学机理,推演出共轭剪切破裂扩展和伴随地震发生的重要物理力学现象及规律。研究结果表明:在高偏差应力场作用下的地下软弱异性体周围岩体满足摩尔-库仑剪切破坏条件发生破坏,形成蝶形破坏区,即花瓣形破坏区,随着蝶形破坏区的扩展,会形成以软弱异性体为中心的显性或隐性X型共轭剪切破裂;软弱异性体周围岩体强度特征变化,使得共轭破裂表现出“X”,“V”,“Y”型共轭特征;在一定地应力和围岩环境中,地壳软弱异性体及其周围岩体构成的非线性动力系统,对于地应力和地层强度的变化具有敏感依赖性,即共轭剪切破裂的扩展尺寸和地震释放的能量具有相互伴生的指数型变化特征,相同的应力扰动在不同的构造应力场作用下引发共轭剪切破裂一次性扩展的尺度不同,会引发不同级别的地震,存在着非敏感依赖区域向敏感依赖区转化的特征拐点。 | 乔建永 马念杰 马骥 赵志强 郭晓菲 师皓宇 | 2019 | 煤炭学报2019，44，6： | 8 |
| 2 | A Statistical Analysis on Tidal Triggering of Earthquakes in the Kashi-Wuqia Intersection Area in Xinjiang显示文摘A statistical analysis on earthquake activity in the Kashi-Wuqia intersection area triggered by earth tide is done by Schusters test and the Permutation test on daily and monthly scales. The north-south,east-west component of the tidal force and tidal body stress are chosen as the tidal curve in the daily scale. The results show that most of the earthquakes occurred near the maximum 0° of the three kinds of tidal curves,the predominant tidal phases of the earthquake are- 5. 86°,6. 60° and- 15. 52°,and the frequency of the earthquakes increases with the increase of the tide; with three kinds of tidal curves( the north-south,east-west component of the tidal force and tidal body stress),the p S of Schusters test for all the earthquakes is 10. 52%,2. 40% and 2. 06%,and the p P of the Permutation test is 10. 90%,2. 40% and 2. 06%,and the results of p S and p P based on the east-west component of the tidal force and tidal body stress are below the threshold of 0. 05 that tidal triggering of earthquakes. In the monthly scale,both the p S and p P are very low( close to 0),far below the threshold of 0. 05 of tidal triggering of earthquakes,and the predominant tidal phase for earthquake triggering is- 18. 95°,close to the maximum 0°( new moon and full moon) of the earth tide in monthly scale. Regarding the statistical test result of tidal triggering of earthquakes,a preliminary explanation is given as to why the trigger effect in the east-west direction is greater than that in north-south direction. | Li Jin Jiang Haikun Song Jin Gui Rong Ji Zhanbo Wen Shaoyan | 2014 | Earthquake Research in China2014，28，4： | 0 |
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