Smoothing effect, conditional bias and recoverable reserves.

Abstract Although many factors play roles in the estimation of recoverable reserves, smoothing effect and conditional bias are considered major geostatistical issues in the estimation. This paper introduces measures for smoothing effect and conditional bias, and provides insights into their relation to the estimation of recoverable reserves. Both smoothing effect and conditional bias are intrinsic to the information effect and kriging estimators. For a given level of drilling information, however, it is possible to identify the optimal search radius that minimizes conditional bias. Furthermore, it is also feasible to define variance correction factor for reduction of the smoothing effect from exploration block models. Both of these components are key to the accurate estimation of recoverable reserves.
Keywords: Geology, Ore reserve estimation, Smoothing effect, Conditional bias, Recoverable reserves, Gold deposits.
Full Access to Technical Paper
PDF version for $20.00
Search
Sort By:  Relevance
Showing results 1 - 3
Text
Summary: N/A
Publication: CIM Bulletin
Author(s): Elhachmi Es-Sadiqi
Keywords: Technical Note
Issue: 1019
Volume: 91
Year: 1998
Text
Summary: Ferrihydrite is often the initial precipitate resulting from the rapid neutralization of Fe(III) sulphate solutions, and it seems to be a major constituent of zinc plant neutral leach residues. The most important parameters affecting ferrihydrite precipitaton are temperature, solution pH and the neutralization rate. Low temperatures and rapid neutralization rates yield poorly filterable ferrihydrite, whereas higher temperatures and slower neutralization rates produce readily filterable...
Publication: CIM Bulletin
Author(s): J.M. Zinck, J.E. Dutrizac
Keywords: Environment, Ferrihydrate, Zinc, Cadmium, Thallium, Tin, Selenium.
Issue: 1019
Volume: 91
Year: 1998
Text
Summary: Successful relationships between mining companies and local stakeholders are now an essential part of the social contract of Òdoing businessÓ (Prescott, 1995). The methodology presented in this paper is designed to assist mining companies in understanding and building relationships with diverse stakeholder groups. The methodology starts by recognizing that mining projects have a natural life cycle which can be used to identify when new external affairs strategies are required. In designing an...
Publication: CIM Bulletin
Author(s): K.L. Azinger
Keywords: Stakeholder analysis, Public affairs, Relationship mapping, NWT Diamond Project.
Issue: 1019
Volume: 91
Year: 1998
Powered by Coveo Enterprise Search