Multi-Factor Degree Set Pair Analysis Fuzzy Evaluation Model for Evaluation of Stability of Surrounding Rock

The integration evaluation of surrounding rock stability is the systems engineering. The concepts of the main same, supper same, assimilation degree and the new determining levels law are stipulated to make up for the defects of routine set pair analysis about the weights and determining levels law based on set pair analysis malleability. The method to determine system level and rank order projects by the main same and assimilation degree was put forward, and then, the multi-factors degree set pair analysis fuzzy evaluation model (EWMFSPAFM) has been suggested. The multi-factors degree set pair analysis fuzzy evaluation model (MFSPAFM) has been applied to evaluate the stability of surrounding rock in diversion tunnel of Daliushu hydro Project, which gets better results. And the result is compared with the results of the routine set pair analysis method, fuzzy matter element method and fuzzy variable set method. It is showed that the MFSPAFM is structure simple, calculation easy, result practical and reasonable, and method feasible and reliable and is fit for surrounding rock stability integration evaluation.