Application of Geostatistics to Construct a Coal Quality Model


Coal washability data can be used for assessing coal quality. However, the techniques of using these data to solve quality problems differ from one mine to another and certain problems may never really be investigated due to limitations of the available techniques. One promising way to overcome these limitations is by correct application of geostatistics. A geostatistical study on coal washability data was undertaken based on a data set of closely spaced in-pin bore cores. These bore cores were analysed consistently over a relatively simple geological area. The average distance between the drill holes was about 100 m. There were 78 drill holes available for the area after deleting the erroneous bore cores. During the study, extra closely spaced drill holes were drilled within a single mining block. A procedure to construct two coal quality models, a kriging or cokriging model and a simulation model, was proposed. The modeling results for the data above are discussed and results of a mine scheduling exercise based on the models developed are included.


Mining Engineering

Keywords and Phrases

Coal Quality; Coal Washability; Geostatistics

Document Type

Article - Conference proceedings

Document Version


File Type





© 1992 Australasian Institute of Mining and Metallurgy (AusIMM), All rights reserved.

Publication Date

01 Jan 1992

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