城门山铜矿矿体存在于裂隙喀斯特（岩溶）化的灰岩中，并且有一部分矿体埋藏在九江县的赛湖底下，矿床的充水条件复杂，一直被认为是“大水矿床”，至今尚未开采。本文分析了该翼天矿充水的各种来说，用数学模型的有限元解计算了各种来源所占的份额。分析了产生湖底塌陷和湖水倒灌的可能性及防治措施。论证了城门山铜矿“水可治、矿可开”。 The Chengmenshan copper deposit exists in the fractured karst limestone, and some ore bodies are buried under the Xihu Lake in Jiujiang County. Due to the complicated water-filling conditions of the deposit, it has been considered as the “big water deposit” , Has not yet been mined. In this paper, we analyze the various aspects of filling water with this wing mine and calculate the share of various sources by using the finite element method of the mathematical model. The possibility of producing lake bottom collapse and lake water intrusion and the prevention and cure measures are analyzed. Demonstrated Shing Mun Shan copper “water can be cured, mine can be opened.”