由于中、长期矿产品价格预测的困难，使在确定地下选别式开采边界品位时所采取的全局优化的方法难以实用，特提出全局次优求解的方法。这种方法在某些情况下，所能取得的经济效益比较接近全局优化方法的理论值。 Due to the difficulty of forecasting the price of medium and long-term mineral products, the global optimization method adopted in determining the grade of underground mining-type mining is difficult to be practical, and a global sub-optimal solution method is proposed. In some cases, the economic benefits achieved by this method are closer to the theoretical values ​​of the global optimization method.