断层相互作用的初步讨论
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摘要
给出了半无限介质中任意倾角的多个已发震矩形断层对邻近任意倾角的潜在活断层共同作用的合应力的解析表达式,从而可以计算震后合应力的调整值,为判断潜在活断层的稳定性提供依据。合应力Sr中既包括了作用在断层面上的正应力,又包括了断层面上的剪应力,它比单独用一个应力描述应力场更有效。最后,用1973年2月6日炉霍地震后的实际震例说明了地震断层错动对周围孕震区的触发作用
Analytical expressions of the resultant stress are presented,which express the resultant effects of many source faults on the potential faults. Adjusting values of resultant stress after earthquake can be calculated in order to provide evidence for determining the stability of potential active faults.The resultant stress includes not only the normal stress on the fault plane but also the shear stress on the fault plane,by which the description of stress field is more effective than by single stress. At last, the triggering action of earthquake fault movement on the adjacent seismogenic zone is expressed using an actual earthquake example (Luhuo M 7.5 occurred in 1973).
引文
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