Prediction of coal grindability from exploration data
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.
- Research Organization:
- Bureau of Mines, Washington, D.C. (USA)
- OSTI ID:
- 5417591
- Report Number(s):
- BM-RI-7421
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
010600 -- Coal
Lignite
& Peat-- Properties & Composition
013000* -- Coal
Lignite
& Peat-- Transport
Handling
& Storage
CALORIFIC VALUE
CARBONACEOUS MATERIALS
CHEMICAL COMPOSITION
COAL
COAL PREPARATION
COMBUSTION PROPERTIES
DRILL CORES
ELEMENTS
ENERGY SOURCES
FORECASTING
FOSSIL FUELS
FUELS
GEOLOGY
GRINDING
MACHINING
MECHANICAL PROPERTIES
NONMETALS
PETROLOGY
SULFUR