There are many complications that influent open-pit limit and the economicstrippingratio 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。
2
The basic principles and applied conditions of three comparing methods calculating economicstrippingratio 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。
3
So, using the internal dumping could decrease the waste volume or increase the production, reduce the strippingratio, and improve the economic benefit.