Abstract: Under the interaction of various internal and external factors, the stability of open-pit mine slope will show different states. Effective analysis of the sensitivity and size of different influencing factors to the slope has important application value for guiding the safe production and prevention of the mine. Based on the analysis of the rock properties, geological structure, hydrological conditions, topography and external factors of the slope of Yuebao open-pit mine, this paper puts forward the key influencing factors of the slope stability of the open pit mine, mainly including the gravity V and internal friction angle ψ. According to the results of the orthogonal test, the sensitivity model of the influencing factors based on the grey correlation analysis is established for five indicators, such as cohesion c, slope top load q, and slope ratio m. The research results show that the sensitivity of the five main influencing factors to the slope stability is as follows: c>ψ>m>V>q. The research results can provide scientific basis for scientific prevention and control of open-pit mine slope.

Key words: open-pit slope, influencing factors, grey correlation analysis, sensitivity analysis