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THE LIMITATIONS OF POPULAR TECHNIQUES FOR PREPRODUCTION RESERVE ESTIMATION IN MINING

This book contains the text of a thesis submitted by Marvin Wade Barnes to the University of Utah for a Master of Science degree (1989). The book documents a study of 5 popular techniques used for computer reserve estimations. The techniques covered include:

• Proximal Polygon Method. The computer version of the traditional polygon technique is the method of nearest points (neighbors).
• Triangular Interpolation. This method is based on Popoff's method of triangles: a method of "gradual changes".
• Cubic Spline. This method is based on polynomial curves in two, three, or higher dimensions. The method follows the law of gradual changes, but values change as smoothly varying curves rather than linear.
• Inverse Distance Technique. This is an inverse weighting to a power method commonly used in ore reserve estimation software.
• Ordinary Linear Kriging. One of the most popular forms of kriging, and based on the concept of minimizing estimation error.

A standard data set was developed and each of the five methods of ore reserve estimation were used on the data set. The focus was on the grade-tonnage prediction, since at feasibility assessment and mine development planning times, this relationship is of most economic importance. The results are based on how much each method over-predicts or under-predicts the actual reserves of the deposit.

Price: US$15 in North America. US$20 including shipping all other countries.

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