Shallow goal grouting technology under 110 kV collecting station in photovoltaicdemonstration base at Datong coal mine subsidence area

In order to ensure photovoltaic facilities good condition，it is necessary to reinforce the coal mine goal below the base.Taking 110 kV collecting station as an example，the stability of the foundation is evaluated based on the analysis of the coal mine goal.According to the geological conditions and the evaluation results of the stability of goaf，the grouting technology is adopted to reinforce the goaf below the collecting station.The paper puts forward the grouting treatment scheme.After grouting，the reinforcement effect is tested.The results show that the grouting reinforcement scheme is reasonable and effective.