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A Geostatistical Study pf Alumina-Content in Ores of An Indian Iron-Ore Deposit

Kannan, S and Patel, KB and Pandalai, HS (1993) A Geostatistical Study pf Alumina-Content in Ores of An Indian Iron-Ore Deposit. In: Journal of the Geological Society of India, 41 (1). pp. 39-50.

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Official URL: http://www.springerlink.com/content/121451/

Abstract

Mining and blending operations in the high grade iron ore deposit under study are performed to optimize recovery with minimal alumina content while maintaining required levels of other chemical component and a proper mix of ore types. In the present work the regionalisation of alumina in the ores has been studied independently and its effects on global and local recoverable tonnage as well as on alternatives of mining operations have been evaluated. The global tonnage recovery curves for blocks (20m x 20m x 12m) obtained by simulation closely approximated the curves obtained theoretically using a change of support under the discretised gaussian model. Variations in block size up to 80m x 20m x 12m did not affect the recovery as the horizontal dimensions of the blocks are small in relation to the range of the variogram. A comparison of the local tonnage recovery curves obtained through multiple conditional simulations made with that obtained by the method of uniform conditioning of block grades on an estimate of panel 100m x 100m x 12m panel grade reveals comparable results only in panels which have been well conditioned and possesing an ensemble simulation mean close to the ordinary kriged value for the panel. Study of simple alternative sequence of mining on the conditionally simulated deposit shows that concentration of mining operations simultaneously on a single bench enhances the fluctuation in alumina values of ore mined.

Item Type: Journal Article
Additional Information: Copyright of this article belongs to Springer.
Department/Centre: Division of Mechanical Sciences > Centre for Earth Sciences
Date Deposited: 31 Jan 2011 12:25
Last Modified: 31 Jan 2011 12:25
URI: http://eprints.iisc.ernet.in/id/eprint/35275

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