Abstract:In this paper, the mining and ore dressing expansion project of a mining area was taken as the research object. On the basis of introducing the construction scale, mining and ore dressing process, water supply and drainage scheme of the expansion project in detail, the engineering geological conditions, hydrogeological conditions and groundwater storage within the scope of the project construction were analyzed by means of preliminary geological exploration, topographic and geomorphological investigation and indoor test. At the same time, this paper used the prediction model generalization method to predict the impact of the expansion project construction on groundwater quality and groundwater level, and put forward groundwater environmental protection measures and countermeasures such as source control, zoning prevention and control, and strengthening monitoring.