the economic stripping ratio 经济合理剥采比
There are many complications that influent open-pit limit and the economic stripping ratio is the most important one.
影响露天矿开采境界的因素很多，其中一个最重要的因素就是经济合理剥采比。
So, using the internal dumping could decrease the waste volume or increase the production, reduce the stripping ratio, and improve the economic benefit.
从而可以减少剥离量或增加采出矿石量，降低剥采比，提高矿山经济效益。
The basic principles and applied conditions of three comparing methods calculating economic stripping ratio are expounded and a series of formulas corresPOnd with the ones are presented in the paper.
阐述了计算经济剥采比三种比效法的基本原理和适用条件。并提出了一套相应的计算公式。
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