品位的急剧下降是矿体边界上的规律。

Sharp grade cutoffs are the rule at margins of ore bodies.

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以净现值最大为优化目标，同时考虑采、选、冶三阶段因素，给出了地下开采矿体边界品位动态优化的方法。

Taking maximum net present value as an optimum target and considering factors in mining, milling and metallurgy, a dynamic optimum method for optimizing cutoff grade of underground orebody is given.

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三维矿体表面建模技术主要包括勘探线剖面矿体边界线的圈定、相邻边界线之间三角剖分和单个边界线内部三角剖分等内容。

The 3d ore body surface modeling technique mainly contains contouring the mineral profiles within prospecting line, triangulating the neighbouring contours, triangulating inside single contours.

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