Computing Ore Reserves by the Polygonal Method Using a Medium-size Digital Computer
Engineers at the Bureau of Mines Denver Mining Research Center have been a research program investigating the theory and application of mine sampling. Part of this program is an investigation of the efficiency of sampling methods that involves development of sampling-method theory through simulating ore-deposit samples and assays, using - electronic digital computer. Theoretical developments are checked against actual ore-deposit sampling, assay, and production data by the commonly used polygonal and triangular methods of computing grade and tonnage of ore reserves. To speed the computing procedures, a program has been developed utilizing a medium-size digital computer for computing ore reserves by the polygonal method. This program calculates nine prismoids per minute at a total cost of $0.21 per prismoid. The complete program, written for an augmented IBM 650 computer, is described in detail; it can be used without change for computing ore reserves for a low-grade deposit. Modifications necessary to convert the program to compute ore reserves for virtually any other type of deposit or grouping of ore horizons also are given; however, the program is limited to using only vertical drill-hole data.
What people are saying - Write a review
We haven't found any reviews in the usual places.
ALF LEACH ALF TONS APPENDIX arranged assay interval assay value boundary Bureau of Mines calculate the area central drill hole changes classes COMPUTER-PROGRAM LISTING computing ore reserves Constant Coordinates copper CUTOR define deposit depth described Description detail determine developed drill-hole drill-hole data EGRTN elevation ELTON equation equipment FIGURE FIX FIX FIX floating given grade and tonnage grade cutoff points included individual input Instruction intersection INTVL involves IVTON LDD ALFPR STD LDD STD WR2 leach lines Location method of computing Mines modification necessary open-pit mines Operation pit bottom pit limits pit slope POLY polygonal method PRINT prismoid proposed punched quadrilateral record reader relationships sample separate SQR ROOT STD LDD STD STORE subroutine survey card triangles underground various vertical volume waste weighted ZERO