Research Status and Prospect of Fan Foundation in Goaf Site

With the development of wind energy resources, wind power has become one of the important clean energy. However, the stability and bearing capacity of wind turbine foundation directly affect the long-term operation of wind power projects, especially in complex geological conditions such as goaf. The goaf refers to the cavity area left after underground mining. The geological structure of these areas is unstable, and there may be phenomena such as settlement and displacement, which poses a serious challenge to the safety of the wind turbine foundation. Therefore, it is the key to ensure the successful implementation and operation of wind power projects to study the design and stability of wind turbine foundation in goaf. At present, the research on the fan foundation in the goaf mainly focuses on the foundation treatment, foundation design and structural optimization. The foundation treatment technology includes soil reinforcement, settlement compensation and other methods to improve the bearing capacity and stability of the soil in the goaf. In terms of foundation design, according to the geological characteristics of the goaf, the researchers proposed a variety of wind turbine foundation forms, such as shallow foundation, pile foundation and deep foundation, to adapt to different geological conditions. However, there are still some challenges in the current research, including how to predict the settlement law of the foundation in the goaf more accurately, how to optimize the design of the wind turbine foundation to improve the seismic resistance and tilt resistance, and how to improve the long-term stability of the foundation. With the development of artificial intelligence, big data and intelligent monitoring technology, future research is expected to further improve the design accuracy and reliability of fan foundation in goaf by combining advanced calculation methods and material technologies.