Large Underground Cavern Ventilation Technology Research

At present, large, layers of underground structure during the construction of the underground ventilation system is a complex technical problems, domestic research on underground structure underground ventilation seldom to from the aspects of construction ventilation mechanical characteristics and dynamic calculation and simulation and analysis the rationality of the ventilation scheme, and the lack of overall consideration and ventilation scheme optimization, so as to make the difference with the actual construction ventilation time, seriously affected the construction plan and the implementation of the project’s overall construction schedule.This paper through field monitoring and use of computational fluid dynamics (CFD) simulation technology, Huangdao Oil Reserve Base in the country of water sealed caverns ventilation mathematical model is established and the wind speed and the harmful gas such as variables in the dynamic changes of underground cavern to verify the design of construction ventilation scheme, and according to simulation results are properly optimized.The main research contents are as follows:The main conclusion of this paper studies are as follows:(1) Different construction of ventilation scheme;(2) The establishment of three-dimensional unsteady mathematical model, through various ventilation cavern of ventilation scheme to simulate studied, optimized and improved ventilation plan;(3) Research on ventilation systems of two specific issues:a,Tunnel construction ventilation airflow effective length study;b, Ram export pressure into the type of tunnel construction ventilation effects.This paper make a comprehensive summary on practical and successful experience of groundwater storage Huangdao Oil Storage Cavern during ventilation of the construction, it can be extended in similar projects.