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Relationships of Coal Properties and Machine Parameters to Continuous Mining Machine Cutting Rates.
Finnie I; Streit R; Foote L
NTIS: PB 297-291 :74 pages
This report presents a review of theoretical models that were developed to study removal operations for various types of materials. Next, a brief summary of coal cutting research is given. Most of the work was done in Great Britain using chisel-type bits rather than the conical picks that are in general use in the United States. A comparison of the specific energies measured for conical picks in the laboratory and in the mine shows encouraging correspondence. Finally, analytical models for coal cutting by picks are suggested. An extension of the British "tensile breakage" theory, developed for chisels, is given for picks. The role of crushing and cutting in coal removal is discussed as a theory that combines the two processes is shown to give reasonable predictions for specific energy requirements. Directions in which the existing theory could be improved are presented and the need for further research is emphasized.
CP; Final Contract Report;
NTIS Accession No.
NTIS: PB 297-291
Page last reviewed: October 29, 2021
Content source: National Institute for Occupational Safety and Health Education and Information Division