本文介绍了采矿设计中确定陷落角的各种不同方法。在此基础上提出在计算陷落角的设计步骤中应考虑破坏类型对陷落角的影响 ,进而根据破坏形式采用相应的计算方法。以板石沟铁矿上青矿区西端岩移问题为例进行了分析计算。 This article presents a variety of different ways of determining the fall angle in mining design. On the basis of this, it is suggested that the influence of failure type on the falling angle should be considered in the design step of calculating the falling angle, and then the corresponding calculation method should be adopted according to the failure mode. Taking the rock drift problem at the west end of the Shangqing mine in the Ishigou iron mine as an example, the paper analyzes and calculates.