Experimental Study On Flood Discharging System Of A High Speed Transit Tailings Reservoir Project

A high-speed main line has to cross a large number of tailings.Once the tailings dam is destroyed,it will directly affect the lives and property of the downstream people and the construction schedule of Expressway,so it is crucial to ensure the safety of the tailing pond.Most tailings accidents are caused by dysfunction of the flood discharge system.Therefore,the primary task of ensuring the safety of the tailings reservoir area is to ensure that the tailing pond discharge system can work safely.This paper uses the tailings reservoir drainage system traversed by a high speed as its research background,and combines the hydraulic model test and the numerical simulation method in the drainage system of the tailings reservoir.The analysis and calculation of flow status,flow velocity,flow thickness,and energy dissipation rate of the effluent stream provide a theoretical basis for the design of the tailings reservoir flood discharge system.The main contents of the experiment are as follows:(1)Design and production of hydraulic model.The designed cyclone shafts are divided into three types,namely type I cyclonic shaft spillway,type II cyclonic shaft spillway,and type III cyclonic shaft spillway,according to experimental design theory,organic Glass is used as a model material,and a hydraulic model is made according to a certain scale.(2)Hydraulic model test.During the test,the discharge flow of the drainage well under normal operating conditions and flood conditions was measured.The measured flow rate is applied to the upstream drainage tunnel of Type I,Type II,and Type III swirling shaft spillway tunnels.At the same time,appropriate methods and equipment are used to record data such as flow velocity and shaft flow thickness,focusing on observation of water flow in flood discharge structures.Flow state,and calculate the energy dissipation rate of shafts of three types of discharge building.The rapid rise of computational fluid dynamics(CFD)methods in recent years has advantages over the hydraulic model tests such as low cost,high efficiency,and comprehensive data.It has been widely used in the engineering and academia,but it has been used for flood discharge in tailings ponds.System design and research area This method is not widely used.This paper explains the theoretical knowledge of CFD main turbulence model theory,numerical simulation of turbulent flow,and numerical solution methods.Combined with the hydraulic model test,a three-dimensional numerical model of three types of swirling shafts was created in the computational fluid software,and the flow velocity,flow state,and pressure of the typical parts were simulated and calculated.The resulting numerical simulation results are basically consistent with the test results.