pit mining boundary 露天境界
safety mining boundary 安全开采边界
economic mining boundary 经济开采边界
economic-mining boundary 经济开采边界
open-pit mining boundary 露天开采境界
Enlarging the mining boundary 扩大开采境界
Traditional open-pit mining boundary features fixed slope with benches and planar bottom.
传统的露天矿开采境界为固定帮有台阶、露天底平面型。
After optimization of deep mining boundary, mining activities become reasonable thus achieving good economic benefit.
通过对境界优化后，可使采场的开采更趋于合理，经济效益十分显著。
The optimization design mainly consists of two contents: adjustment of the mining boundary of open pit and optimization of production scale.
优化设计主要包括两方面的内容：露天开采境界的调整和生产规模的优化。
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