Pit-limit analysis is also a valuable procedure in determining the phase pitlimits.
境界分析对大型矿山确定分期开采的分期境界也具有重要价值。
2
The moving cone method which is usually used to optimize the pitlimits is used to establish the external spoil pile limits. with the aid of a computer, it can establish spoil pile limits rapidly.
借用露天开采境界优化的常用动锥法，对外排土场境界赋值，且可用计算机实现境界赋值全过程。
3
The dosage of caproic acid-producing bacterium and liquid fermentation pit mud mixed culturing liquid to tend fermentation pit mud has some limits;