An Assessment of Cutoff Grade Parameters: A Case Study of Coal Deposit

Abstract

One of the most important aspects of coal deposits is to examine the cutoff grade parameters. The bivariate lognormal distribution model with two uncorrelated samples will serve as an important tool for analysis of these parameters. In this article, the Seyitomer coal deposit in Kutahya (Turkey) parameters, such as moisture and ash, were assessed by a bivariate lognormal distribution model with two uncorrelated samples. Through the results from the model, it was determined that there are tonnage rate, mean of moisture, and mean of ash, which involve the identification of cutoff moisture and cutoff ash. Thus, this study shows the usefulness of a bivariate lognormal distribution model with two uncorrelated samples for analysis and interpretation in the cutoff grade parameters.