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Thickness of Bituminous-Coal and Lignite Seams at All Mines and Thickness of Overburden at Strip Mines in the United States in 1950

Description: Report issued by the U.S. Bureau of Mines discussing bituminous-coal and lignite seams, and overburden of strip mines during 1950. Descriptions of the seams and strip mines are presented. This report includes tables, maps, and illustrations.
Date: September 1952
Creator: Young, W. H. & Anderson, R. L.
Item Type: Refine your search to only Report
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Ventilating Practices that Minimize Explosion Hazards in Bituminous-Coal Mines

Description: Report issued by the U.S. Bureau of Mines discussing mine ventilation designed to reduce explosion hazards. As stated in the scope and purpose of study, "this circular is intended to present important recommended practices that are necessary to minimize the possibilities of methane accumulations in coal mine and reduce the chances of ignitions from electrical sources" (p. 1). This report includes illustrations.
Date: September 1952
Creator: Ankeny, M. J.; Westfield, James & Kingery, D. S.
Item Type: Refine your search to only Report
open access

Specifications for Selected Hydraulic-Powered Roof Supports: With a Methods to Estimate Support Requirement for Longwalls

Description: Report issued by the Bureau of Mines discussing hydraulic-powered roof support specifications. As stated in the abstract, "this report presents observations made by Bureau engineers regarding hydraulic-powered roof supports that are currently being used or have been used on nearly all operating long-walls in the United States" (p. 1). This report includes tables, and illustrations.
Date: September 1969
Creator: Barry, A. J.; Nair, O. B. & Miller, J. S.
Item Type: Refine your search to only Report
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