Multiple-Shift Mechanical Mining in some Bituminous-Coal Mines: Progress Report 4. Extraction of Pillars with Mechanized Equipment
Description:
Report issued by the U.S. Bureau of Mines discussing "some methods and practices of mining coal mechanically where operations are conducted on more than one shift" (p. 3). Descriptions of mines, and mining methods are presented. This report includes tables, and illustrations.
Date:
December 1942
Creator:
Toenges, Albert L.; Maize, Earl R. & Jones, Frank A.
Item Type:
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Report
Partner:
UNT Libraries Government Documents Department