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应用Ｌｊａｐｕｎｏｖ指数，研究了失稳准则和稳定度的概念，分析了最大Ｌｊａｐｕｎｏｖ指数ＬＥ１与稳定性之间的关系以及｜ＬＥ１｜的物理意义。提出将ＬＥ１作为岩土边坡的稳定判据，将｜ＬＥ１｜作为系统稳定度的表征量。由碧口水电站的青崖岭库区滑坡的应用实例证明，该法确定的稳定判据符合实际情况。
Applying the Ljapunov exponent, we study the concept of instability criterion and stability, and analyze the relationship between the maximum Ljapunov exponent LE1 and stability and the physical meaning of | LE1 |. It is proposed that LE1 be used as a stable criterion for rock slope and | LE1 | be the characterization of system stability. The application example of the landslide in Qingyaling reservoir area of Bikou Hydropower Station proves that the stability criterion determined by this method accords with the actual situation.