Skip to main content
placeholder image

DEVELOPMENT OF DRILLING STRATEGY USING GEOSTATISTICS - A CASE STUDY IN PORPHYRY COPPER DEPOSIT.

Conference Paper


Abstract


  • An alternative development drilling strategy to the one currently in use at an open pit mine was investigated using geostatistics for a portion of the pit. The massive orebody, the 3-D nature of the problem, and the location of ultimate pit limit in the study area all created some unique problems in devising the development drilling strategy. Rather than using confidence interval of the global reserve estimate as the main criterion for development drilling, the confidence interval of short and medium range mine planning blocks was used as the objective. Based on somewhat arbitrarily selected level of confidence, the results from the study showed that a total of 50 diamond drillholes (DDHs) rather than the planned 62 DDHs is sufficient in the study area, if the selected confidence levels are acceptable to the management. The paper also emphasizes the importance of particular objectives being used in development drilling and how they influence the 'optimal' placement of the development drillholes.

Publication Date


  • 1986

Citation


  • Baafi, E. Y., & Kim, Y. C. (1986). DEVELOPMENT OF DRILLING STRATEGY USING GEOSTATISTICS - A CASE STUDY IN PORPHYRY COPPER DEPOSIT.. In Symposia Series - Australasian Institute of Mining and Metallurgy (pp. 161-167).

Scopus Eid


  • 2-s2.0-0022866654

Web Of Science Accession Number


Start Page


  • 161

End Page


  • 167

Abstract


  • An alternative development drilling strategy to the one currently in use at an open pit mine was investigated using geostatistics for a portion of the pit. The massive orebody, the 3-D nature of the problem, and the location of ultimate pit limit in the study area all created some unique problems in devising the development drilling strategy. Rather than using confidence interval of the global reserve estimate as the main criterion for development drilling, the confidence interval of short and medium range mine planning blocks was used as the objective. Based on somewhat arbitrarily selected level of confidence, the results from the study showed that a total of 50 diamond drillholes (DDHs) rather than the planned 62 DDHs is sufficient in the study area, if the selected confidence levels are acceptable to the management. The paper also emphasizes the importance of particular objectives being used in development drilling and how they influence the 'optimal' placement of the development drillholes.

Publication Date


  • 1986

Citation


  • Baafi, E. Y., & Kim, Y. C. (1986). DEVELOPMENT OF DRILLING STRATEGY USING GEOSTATISTICS - A CASE STUDY IN PORPHYRY COPPER DEPOSIT.. In Symposia Series - Australasian Institute of Mining and Metallurgy (pp. 161-167).

Scopus Eid


  • 2-s2.0-0022866654

Web Of Science Accession Number


Start Page


  • 161

End Page


  • 167