STUDI PERBANDINGAN ANTARA METODE POLIGON DAN INVERSE DISTANCE PADA PERHITUNGAN CADANGAN Ni PT. CIPTA MANDIRI PUTRA PERKASA KABUPATEN MOROWALI

Abstract

Comparison of two methods for calculating the reserve an activity to get more precise results or according to the actual situation. This study aims to determine the ratio between the number of backup Ni polygon method and the method of inverse distance. The type of data that is used in the form of data totaling 59 points coring drill, coordinate data of each drill hole is located at the study site, and the data content of the laboratory analysis results. From research conducted, comparing the relationship cut off grade - tonnage nickel ore by two methods: the method of polygons and distance inverce obtained polygon method the amount of reserves to 1.5% Ni - 1.79: 346 790 tonnes, 1.8% Ni - 1, 9%: 167 907 tonnes, and Ni> 2.0%: 489 066 tonnes. While the Inverse Distance method is 1.5% Ni - 1.79: 490 313 tonnes, Ni 1.8% - 1.9%: 167 813 tonnes, and Ni> 2.0%: 291 618 tonnes. From these data made a chart comparison cut off grade - tonnage. From the graph shows the amount of reserves COG 1.5% - 1.79% and COG 1.8% - 1.9% using fewer polygons than the inverse distance method and the amount of reserves COG> 2.0% by
using the polygon method more than the inverse distance method.