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NONNEGATIVE WEIGHTS OF LINEAR KRIGING ESTIMATION.

Journal Article


Abstract


  • The technique of linear kriging as a grade estimation method of mining blocks is reasonably established in the mining industry. To guarantee nonnegative weights, an additional constraint is required in the kriging system of equations. Results obtained using the developed algorithm are compared with those using the standard linear kriging in terms of computer time and the estimation results. Both were higher with nonnegative constraint, as expected. However, some systematic pattern was observed in the kriged values (i. e. , over- or underestimation) with or without the nonnegative constraint. The study also demonstrated when one should generally expect negative kriging weights in practice, and what practical impact the negative weights can have on the kriging estimates.

Publication Date


  • 1986

Citation


  • Baafi, E. Y., Kim, Y. C., & Szidarovszky, F. (1986). NONNEGATIVE WEIGHTS OF LINEAR KRIGING ESTIMATION.. Transactions of the American Institute of Mining, Metallurgical, and Petroleum Engineers, Society, 280(pt A), 437-442.

Scopus Eid


  • 2-s2.0-0022856380

Web Of Science Accession Number


Start Page


  • 437

End Page


  • 442

Volume


  • 280

Issue


  • pt A

Abstract


  • The technique of linear kriging as a grade estimation method of mining blocks is reasonably established in the mining industry. To guarantee nonnegative weights, an additional constraint is required in the kriging system of equations. Results obtained using the developed algorithm are compared with those using the standard linear kriging in terms of computer time and the estimation results. Both were higher with nonnegative constraint, as expected. However, some systematic pattern was observed in the kriged values (i. e. , over- or underestimation) with or without the nonnegative constraint. The study also demonstrated when one should generally expect negative kriging weights in practice, and what practical impact the negative weights can have on the kriging estimates.

Publication Date


  • 1986

Citation


  • Baafi, E. Y., Kim, Y. C., & Szidarovszky, F. (1986). NONNEGATIVE WEIGHTS OF LINEAR KRIGING ESTIMATION.. Transactions of the American Institute of Mining, Metallurgical, and Petroleum Engineers, Society, 280(pt A), 437-442.

Scopus Eid


  • 2-s2.0-0022856380

Web Of Science Accession Number


Start Page


  • 437

End Page


  • 442

Volume


  • 280

Issue


  • pt A