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Prediction of Coal Grindability from Exploration Data.

Gomez M; Hazen K

NTIS: PB 194 041 :34 pages

10001775

A general prediction model for the hardgrove grindability index was constructed from 735 coal samples using the proximate analysis, heating value, and sulfur content. The coals used to develop the general model ranged in volatile matter from 12.8 to 49.2 percent, dry basis, and had grindability indexes ranging from 35 to 121. A restricted model applicable to bituminous coals having grindabilities in the 40 to 110 range was developed from the proximate analysis and the petrographic composition of the coal. The prediction of coal grindability within a single seam was also investigated. The results reported support the belief that mechanical properties of the coal are related to both chemical and petrographic factors of the coal. The mechanical properties of coal may be forecast in advance of mining, because the variables used as input to the prediction models can be measured from drill core samples collected during exploration.

19700101

IH; Report of Investigations

1970

PB-194041

A04

RI 7421

DRC;

NTIS: PB 194 041