Study On The Influence Of The Faults Of Water-carriage System Of Tianhuangping Hydroelectric Power Station On Water-carriage System

Aimed at the current issue that there are some concentrated leakage points existing in water-carriage system region of Tianhuangping Pumped Storage Station(mainly related to faults,dykes,etc),that is concentrated seepage issues of water-carriage system region,take the fluid-solid-heat coupling analysis of water-carriage system region and utilize the ground penetrating radar on-site detection and wall rock hydraulic fracturing analysis to study on the influence of regioanal fault of water-carriage system on water-carriage system,then define these collective seepage passageway,predicte and calculate the potential permeability stability and dangers of wall rock of water-carriage system region in the long-term under the action of high water head,and propose appropriate measures to deal with.The main contents are as follows:1) The collection and analysis of hydrogeololgy, engineering geologic condition and related parameters of water-carriage system regionCollect and analyze the research achievement of hydrogeololgy, engineering geologic condition and related parameters of water-carriage system region,master the attitude and character of major faults,dykes and fractured group,especially emphasize the permeability parameters and connectivity extended features of each faults intersected with water-carriage system,and joint fissures development division and its permeability parameters.Collect and analyze the project location and scope,like the grouting reinforcement and stoppage, of various stages of water-carriage system region.2) The fluid-solid-heat coupling analysis of water-carriage system regionAimed at water-carriage system of Tianhuangping Pumped Storage Station,on the basis of the related documents,first establish a set of fluid-solid-heat fully coupled equations of porous rock mass media transent(including the mutual coupling process of solid deformation,energy transmission and fluid flow,the cross-coupled of multi-physics scene,and coupling relationship between material property and independent variables).Then take the software COMSOL(multi-physics simulated tool based on partial differential equation sets)as a platform,successfully solve the fully coupled partial differential equations,to obtain the fluid-solid-heat coupling field of water-carriage system region of Tianhuangping Pumped Storage Station. 3) Application of ground penetrating radar detect concentrated seepage position of water-carnage system regionOn the basis of geological survey data from Huadong engineering corporation and leakage weak positions detection data from Hehai University,apply ground penetrating radar, layout measuring points among exploration cave and construction adit and so on,detect the plentiful of water fault and joint band of water-carriage system region,preliminarily define superficial layer concentrated leakage passages of each cave porous point,provide the foundation for the next step that inversion analysis concentrated seepage channel.4) Hydraulic fracturing analysis of convey tunnel wall rock under high headAimed at the current lack of hydraulic fracturing research,based on fracture mechanics principle,focus on the following issues:①Stress intensity factor calculation of various types fracture of underground surrounding rockmass area,and theory criterion of mixed mode crack occurring hydraulic fracturing;②Compression and shear fracture mechanism,calculation and criterion of Compression and shear fracture stress intensity factor under water pressure;③Apply the above theory to the analysis of hydraulic fracturing of bifurcation batch wall rock of water-carriage system of Tianhuangping Pumped Storage Station.