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Mining practice at Ray Mines, Nevada Consolidated Copper Co., Ray, Ariz.
History of district; geology; prospecting and exploration; sampling and estimation; development; mining by hand-trimming; motor, modified motor, and sublevel method; underground transportation; contracts and bonus payment for labor; ventilation; mine drainage; safety methods; first-aid and fire prevention; tabular cost data.
Mining practice at Ray Mines, Nevada Consolidated Copper Co., Ray, Ariz.
History of district; geology; prospecting and exploration; sampling and estimation; development; mining by hand-trimming; motor, modified motor, and sublevel method; underground transportation; contracts and bonus payment for labor; ventilation; mine drainage; safety methods; first-aid and fire prevention; tabular cost data.
Mining practice at Ray Mines, Nevada Consolidated Copper Co., Ray, Ariz.
U.S. Bur. Mines -- Information Cir
Thomas, R.W. (author)
1929
25 pages
16 Figs.
Report
English
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