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| Indice di Lavoro di Bond× | Lerchs-Grossmann Algorithm× | |
|---|---|---|
| Campo | Ingegneria mineraria | Ingegneria mineraria |
| Famiglia | Process / pipeline | Process / pipeline |
| Anno di origine≠ | 1952 | 1965 |
| Ideatore≠ | Fred C. Bond | Helmut Lerchs and Israel Grossmann |
| Tipo≠ | Empirical method for grinding energy estimation | Graph-theoretic algorithm for pit limit optimization |
| Fonte seminale≠ | Bond, F. C. (1952). The third theory of comminution. Transactions of the American Institute of Mining and Metallurgical Engineers, 193, 484-494. link ↗ | Lerchs, H., & Grossmann, I. F. (1965). Optimum design of open-pit mines. Canadian Mining and Metallurgical Bulletin, 58(633), 47-54. link ↗ |
| Alias≠ | Bond Work Index, BWI, Bond Index Test | Lerchs-Grossmann Method, LG Algorithm |
| Correlati≠ | 3 | 4 |
| Sintesi≠ | The Bond Work Index, introduced by Fred C. Bond in 1952, is an empirical parameter that characterizes the resistance of an ore to grinding in a tumbling mill. It is defined as the kilowatt-hours per short ton (kWh/st) of electrical energy required to reduce a coarse ore from theoretically infinite size to 80% passing 100 micrometers. The Bond Index is foundational in mineral processing plant design and cost estimation worldwide. | The Lerchs-Grossmann Algorithm is a graph-theoretic method for determining the ultimate pit limit in open-pit mining operations. Introduced by Helmut Lerchs and Israel Grossmann in 1965, it maximizes the net present value of extracted ore while respecting slope stability constraints. This algorithm forms the theoretical foundation for most modern pit optimization software. |
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