Abstract：In light of the problem of slope stability under flexible protection in open-pit mine，a numerical analysis model is established by using the theory of elastoplasticity. According to the elastoplastic model，the influence degree of blasting shock on stability of the high-deep rock slope is imitated by using elastoplastic finite element method；the displacement field and the safety factor of the slope with fault at later stage are computed. The numerical analysis results show that the proposed flexible protection system is valid and applicable to the rock slope engineering in mountainous areas.
