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Title: Prediction of coal grindability from exploration data

Abstract

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 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.

Authors:
;
Publication Date:
Research Org.:
Bureau of Mines, Washington, D.C. (USA)
OSTI Identifier:
5417591
Alternate Identifier(s):
OSTI ID: 5417591
Report Number(s):
BM-RI-7421
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
01 COAL, LIGNITE, AND PEAT; COAL; GRINDING; MECHANICAL PROPERTIES; CALORIFIC VALUE; CHEMICAL COMPOSITION; COAL PREPARATION; DRILL CORES; FORECASTING; PETROLOGY; SULFUR; CARBONACEOUS MATERIALS; COMBUSTION PROPERTIES; ELEMENTS; ENERGY SOURCES; FOSSIL FUELS; FUELS; GEOLOGY; MACHINING; NONMETALS 013000* -- Coal, Lignite, & Peat-- Transport, Handling, & Storage; 010600 -- Coal, Lignite, & Peat-- Properties & Composition

Citation Formats

Gomez, M., and Hazen, K.. Prediction of coal grindability from exploration data. United States: N. p., 1970. Web.
Gomez, M., & Hazen, K.. Prediction of coal grindability from exploration data. United States.
Gomez, M., and Hazen, K.. Sat . "Prediction of coal grindability from exploration data". United States.
@article{osti_5417591,
title = {Prediction of coal grindability from exploration data},
author = {Gomez, M. and Hazen, K.},
abstractNote = {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 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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1970},
month = {8}
}

Technical Report:
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