Research on methods to determine mechanical parameters and stability of rock mass from high rock slope

With an open pit mining of the Yunnan high rock slope engineering field as a research object,the paper described the mechanical parameters of rock slope stability and the study of importance of the in situ test for hard rock or soft rock does not apply nature of hard rock.Laboratory experiments with the mechanical parameters of rock and rock mass quality rating is based on RMR.Considering the fractured rock mass,rock mass structure,the impact of groundwater,the use of Hawk-Brown(Hoek-Brown) rock strength criterion parameters will be amended and converted into a reduced rock mass parameters are derived.In situ testing and on-site mechanical parameters of soft rock from the combination of the final results of rock mechanics parameters.In the survey,based on research using the finite difference method(FLAC numerical analysis software) on the status of static slope stability analysis,a reasonable final slope angle and the total step height is obtained to ensure normal production and economic benefits of mining to improve.