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Mining Methods and Practice in the Michigan Copper Mines

Description: From Introduction: "The mining methods described and discussed in this report have been considered historically-that is, from early to present practice. The data for this report were collected during 1927."
Date: 1929
Creator: Crane, W. R.
Partner: UNT Libraries Government Documents Department

Rock Bursts in the Lake Superior Copper Mines, Keweenaw Point, Michigan

Description: From Introduction: "The effect of rock pressure may be general and continuous disintegration and reduction in size of pillars of ore and rock left for the support of the workings, resulting in the collapse of hanging wall and the closing of stopes, drifts, and shafts, or the action may be sudden and violent and aside from seriously affecting the workings may present a real hazard to the operation of mines. The object in the preparation of this report is to add to the accumulated information and from the facts presented to make suggestions for protective measures to be taken when possible."
Date: 1929
Creator: Crane, W. R.
Partner: UNT Libraries Government Documents Department

Annual Report of Research and Technologic Work on Coal: Fiscal Year 1941

Description: Report issued by the U.S. Bureau of Mines discussing the annual report over the research and technology of coal during 1941. As stated in the foreword, "these investigations increase our fund of exact knowledge on the properties and composition of American coals and lead to better methods in mining, preparing, storing, and utilizing coal" (p. 4). This report includes tables, illustrations, photographs, and a map.
Date: November 1941
Creator: Fieldner, Arno Carl & Schmidt, L. D.
Partner: UNT Libraries Government Documents Department

Accident Experience: Iron-Ore Mines, Lake Superior District, 1940-43

Description: Report issued by the U.S. Bureau of Mines discussing the iron-ore mining accident experience in the Lake Superior District. Frequency and severity rates of accidents between 1940 and 1943 are presented. This report includes tables.
Date: May 1945
Creator: Cash, Frank E. & Larsen, Reuben D.
Partner: UNT Libraries Government Documents Department

Experiments in Underground Communication Through Earth Strata

Description: Technical paper issued by the Bureau of Mines over studies in mine safety and communication. The methods and equipment used in the studies are presented and discussed. This paper includes tables, illustrations, and photographs.
Date: 1928
Creator: Ilsley, L. C.; Freeman, H. B. & Zellers, D. H.
Partner: UNT Libraries Government Documents Department