The open well method and water balance method are widely worked in mine hydrogeological exploration at present,but usually used in the area of simple hydrogeological condition. By abstracting the complicated hydrogeological condition to the ideal mathematical calculation,we predicted the tunnel water inflow,providing the basis data to the mining. Taking Yuele lead-zinc district of the Northeastern Yunnan Province as an typical example,we analyzed the distribution of this lead-zinc district’s aquifer and impermeable layer. Based on the sufficient cognition of this mine’s hydrogeological condition,we used the open well method and the water balance method to calculate the mine water inflow,and acquire an ideal effect. The consequence of this case proved that the two method(open well method and water balance method) can be used in the mine which has complicated hydrogeological condition. And the same time this case can offer a basal mirror for this type of research.%大井法、水均衡法目前在矿床水文地质勘查中的运用多局限于水文地质条件简单的地区。通过将复杂水文地质条件下的涌水量计算抽象为理想的数学计算，预测坑道涌水量，达到为矿山开采提供水文预测预报的目的。以具有多含隔水层叠置分布地质背景的滇东北地区悦乐铅锌矿区为例，在充分认识矿区地质背景的基础上，采用大井法、水均衡法对其坑道涌水量进行计算，并且取得了较为理想的效果，验证了在复杂条件下两种方法的可行性，为相关研究提供借鉴。
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