Optimum Design For West And Northwest Bound Slope In Buzhaoba Open-Pit Deep Mining

High steep rock slope is acomplicated systematic engineering,it's stabilization directly concerns economic benefit and safety production of mine enterprise.with the extension of open-pit mining and the increase of slope angle, high steep slope safety control technology under complicated geological conditions will directly related to normal production or not,how to master the stability of open-pit high steep slope under complicated geological conditions, and to ensure its security in mining process is still important research topic in the process of open-pit mining.Therefore,this paper focuses on deformation mechanism and Stability Assessment comprehensive analysis of buzhaoba open-pit high steep slope of soft rock; Studied technology and method of slope rock mass intelligent matching optimum design,basised for critical sliding field theory,Stratigraphic distribution and its mechanical parameters,given safety margin.The main contents of this paper are as follows:1. Systematically summarized the existing approaches of slope stability analysis, and analyzed existing the problems;2. Applied three-dimensional elastoplastic finite element method, Analysised the deformation mechanisms and evolution law of slope rock mass stress field under the complex geological conditions,identified the rock slope failure mode of the west and northwest bound of buzhaoba open-pit;3. Determined the potential slip surface of slope using critical slip field, thus, maked coupling analysis of the slope stability combined with limit balanced method;4. Maked slope surface displacement dynamic analysis, so as to provide a basis for slope stability evaluation;5. According to theory of fuzzy mathematics,established fuzzy comprehensive evaluation model of the slope stability, maked the fuzzy evaluation of the slope stability, provided the basis for comprehensive evaluation of slope stability.6. Established technology and method of slope rock mass intelligent matching optimum design,basised for critical sliding field theory,stratigraphic distribution and its mechanical parameters,given safety margin,It has been optimized design to buzhaoba west bound final highwall,amend deficiency of the original design; The method can also solve the overall stability and local stability evaluation issue at the same time, the method is valuable.