Research On The Damage Deformation Rock Slope Failure Mechanism Under The Hydrodynamic Conditions And Its Application

Landslide stability problem has been one of important problems in hydraulic engineering，Chinais one of the world’s landslide disaster is very serious in the country. The planning and constructionof the hydropower station in Liaoning province Fuxin city Hai zhou pumped storage pit pumping，landslide constitutes one of the major engineering geological problems in the engineeringconstruction must face. Water is the result of the most active and common factors of landslidedevelopment， is also the most difficult to determine the factors and quantitative research.Liaoning province Fuxin city Hai zhou open-pit mine pumped storage hydroelectric powerstation to be built after reservoir impounding， lifting and periodic fluctuation of reservoir waterlevel and groundwater level， will change the slope of environmental geological conditions，including changes in rock， soil physical and mechanical properties of hydrostatic pressure andosmotic force and periodic variation caused by large deformation， landslide. The landslide occurredin large deformation or failure， will be a direct threat to the safety of hydropower plant， causingserious economic， social influence the normal operation of power station and. Therefore， it isnecessary to study on the stability of landslide body in current conditions and different water level，water level fluctuation conditions， to ensure Fuxin Hai zhou open-pit mine pumped storage plays animportant role in smooth operation of hydropower station. Based on the literature at home andabroad of rock and soil slope stability analysis and calculation on the basis of the literature， themain research Hai zhou open-pit mine geological environment condition， deformation in furtherresearch on Hai zhou mine E20slope formed geological conditions and Ertang valley reservoir leftabutment rock block geological environmental conditions， the main factors affecting thecharacteristic and failure landslide stability analysis of slope stability， established the constitutiveseepage-stress coupling model，the Mohr-Coulomb yield criterion， the use of FLAC3Dgeotechnicalengineering software as calculation and analysis tools. The main conclusions are as follows：1) Studied in Hai zhou open-pit mine hydrogeology and engineering geology were Liao Ningprovince city of Fuxin，environmental conditions，the investigation of the Liaoning province Fuxincity Hai zhou open-pit mine half a century history of mining in Hai Zhou coal mine， a preliminaryanalysis of the construction process， the happened geological disasters， calculation and analysis ofinfluencing factors on the stability of slope concrete statistics，the key factors affecting the water onthe stability of the slope in Hai Zhou open-pit mine. The E20slope concrete as the research object，aiming at further research on typical slope deformation of E20slope geological environmentalconditions， the main factors affecting the failure characteristics and stability of landslide， throughthe engineering analogy and engineering geological mechanics and other means， to E20landslidepotential failure mode and the local unstable rock mass analysis results show that， with sliding slope the main failure form， locally by groups of structural plane is formed by the combination ofQi shape unstable block collapse phenomenon rarely occur.2) The damaged rock mass seepage field and stress field of the fluid-solid coupling theory arederived based on the seepage field and stress coupled differential equations and Biotthree-dimensional consolidation differential equation of force field， considering the doublecoupling， derived with increment of displacement and pore pressure increment as Fang Chengyuvariable saturated-unsaturated rock soil coupled consolidation equations.3) In order to improve simulation accuracy， this paper mainly by the strength reduction finiteelement method and limit equilibrium method for calculation of slope stability analysis in the E20study， the calculation results show that： the calculation results obtained similar results with thelimit equilibrium method simulation of corresponding working condition， the simulation resultsshow that the most dangerous sliding surface position and the limit equilibrium method to calculatethe results of the analysis are similar，mutual supply the slope groundwater and reservoir water afterthe simulation calculation of pore water pressure isoline distribution and limit equilibriumcalculation results are very similar. This indicates that the strength reduction finite element methodof pumped storage for fluid-solid numerical simulation analysis is more suitable for E20slope ofhydropower station reservoir， therefore， of Hai Zhou open-pit coal mine can be taken to correctthe parameters and practical engineering design.4) Hai zhou open-pit coal mine proposed pumped storage hydropower station reservoir operation,when the reservoir water level of160m and hydropower station landing when pumping water from110m to110m under the working condition of two kinds of reinforcement before and afteranalyzing the results of numerical calculation, the results show that the water level change of E20slope stability influence is very big. But E20slope anchorage safety coefficient of slope increasedobviously after treatment. So that it is effective to anchor the E20slope reinforcement measures.5) Ertang valley reservoir Numerical left abutment rock block stability analysis results showthat： the critical stable state at the left abutment rock mass under the natural state， but the stormconditions safety coefficient is less than1， in an unstable state. Simulation of the rock blocks werecut slope of the weight loss after the calculation results show that， Ertang valley reservoir leftabutment slope stability increases obviously.