Prediction of coal grindability from exploration data

Technical Report · Sat Aug 01 00:00:00 EDT 1970

OSTI ID:5417591

Gomez, M; Hazen, K

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

Related Subjects

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