安家峪尾矿库6号排水井泄洪能力数值模拟分析OA

In this paper,the No.6 drainage well of Chengde Anjiayu Tailing reservoir is taken as the research object,the RNG k-ε turbulence model in Flow-3D and finite difference discretization method are employed to carry out numerical simulation.The hydraulic indexes such as discharge capacity,flow pattern,flow velocity and dynamic water pressure under different weir head are obtained.It is found that the discharge capacity of the No.6 drainage well increases rapidly with the increase of the head in front of the weir,then the increase rate slows down and finally remains stable.The turbulence range of the shaft under each head is large,and the flow of the branch tunnel impinges on the side wall of the main tunnel,resulting in spiral flow and a small range of reflux,which conforms to the characteristics of turbulence model.Due to the high vertical shaft of the drainage well,negative pressure will occur when the water flow falls into the force dissipation well,and the numerical simulation situation is very close to the problem encountered in the actual project.For this phenomenon,air entrainment canister and snorkel can be set up in the shaft,so as to avoid causing harm to the flood drainage system.Water flowing into a force dissipation well will produce a large pressure at the bottom of the force dissipation well,so it is advisable to strengthen the structural protection design in this area.The design of the No.6 drainage well in Anjiayu tailing reservoir is reasonable and can meet the required flood discharge requirements.The research in this paper could provide a basis for the safe operation of the tailing reservoir.