Abstract Dfect of the present calculating metheds to total mine recovery are pointed out by comparison, and a new calculating methed is interred and checked.

• 通过比较，指出了现行全矿区（井）总开采回采率计算方法的缺陷，推导出新的全矿区（井）总开采回采率计算方法，并用实例加以验证。