Research On Slope Stability Of An Open-pit Mine In Guizhou

High and steep rock slope has great influence on the stability of open pit mine slope.Due to the complex relationship between rock and rock mass,how to measure and analyze engineering rock mass can obtain more accurate and effective rock mass parameters,which method can be used to make accurate evaluation of slope stability,and how to make effective prediction method suitable for engineering for mine deformation has been a hot topic in the engineering field.Based on a phosphate ore block in Guizhou,this paper analyzes the above problems as follows.(1)Through the preliminary exploration of the mine research area,the slope is divided into geological zones according to the geological data,and the structural plane of each area is investigated by combining the traditional detailed line survey method and three-dimensional laser scanning method,so as to obtain more comprehensive structural plane information and analyze the investigation results;(2)Combined with discontinuity network simulation,RQD value of rock mass is obtained,and conventional mechanical tests are carried out on field samples by using indoor mechanics.Rock mass quality is classified by RMR method,and then mechanical parameters of rock mass are obtained by Hooke Brown criterion;(3)The slope is classified,the stereographic projection method is used to analyze the slope stability qualitatively,and the potential sliding surface of the slope is determined;(4)Based on the mechanical parameters obtained from the test,combined with the strength reduction method,the stability of the southeast slope and the south slope of the mine is analyzed by using phase software;(5)The shear strength of each slope is refined by using the roughness of structural plane.Combined with the limit equilibrium method,the sliding surface is specified by CAD,and the stability of composite step slope and step slope is analyzed by importing slide software.(6)The metabolic model of slope deformation is established based on the displacement data of field displacement monitoring,and compared with GM(1,1)model,so as to realize the rapid and dynamic prediction and analysis of slope deformation.