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Author : R. C. Bartholomae,R. S. Becker
Publisher : Unknown
Page : 36 pages
File Size : 41,5 Mb
Release : 1983
Category : Coal-mining machinery
ISBN : UOM:39015078489740
Author : Anonim
Publisher : Unknown
Page : 806 pages
File Size : 40,5 Mb
Release : 1976
Category : Fossil fuels
ISBN : UIUC:30112087480528
Author : R. C. Bartholomae,Ralph Sherman Becker
Publisher : Unknown
Page : 128 pages
File Size : 52,7 Mb
Release : 1982
Category : Electronic
ISBN : OCLC:988626497
Author : Anonim
Publisher : Unknown
Page : 302 pages
File Size : 47,5 Mb
Release : 1988
Category : Mineral industries
ISBN : UCBK:C049523116
Author : Anonim
Publisher : Unknown
Page : 384 pages
File Size : 42,6 Mb
Release : 1983
Category : Flocculation
ISBN : STANFORD:36105006344191
Author : United States. Bureau of Mines
Publisher : Unknown
Page : 152 pages
File Size : 43,9 Mb
Release : 1984
Category : Mine safety
ISBN : UOM:39015078465237
Author : Anonim
Publisher : Unknown
Page : 616 pages
File Size : 48,8 Mb
Release : 1984
Category : Mines and mineral resources
ISBN : OSU:32435067593418
Author : Christopher H. Roe
Publisher : Unknown
Page : 490 pages
File Size : 46,9 Mb
Release : 1984
Category : Tailings (Metallurgy)
ISBN : STANFORD:36105110634610
Author : Anonim
Publisher : Unknown
Page : 634 pages
File Size : 47,9 Mb
Release : 1985
Category : Power resources
ISBN : MINN:30000006283661
Author : United States. Bureau of Mines
Publisher : Unknown
Page : 226 pages
File Size : 42,8 Mb
Release : 1992
Category : Mineral industries
ISBN : IND:30000065660668
Author : United States. Bureau of Mines. Branch of Editorial Services
Publisher : Unknown
Page : 160 pages
File Size : 52,9 Mb
Release : 1982
Category : Mineral industries
ISBN : UOM:39015047379063
Author : R. C. Bartholomae,John Kovac,Jack Robertson
Publisher : Unknown
Page : 28 pages
File Size : 45,9 Mb
Release : 1983
Category : Coal-mining machinery
ISBN : UOM:39015078460378
Noise generated by continuous mining machines in underground coal production is an important health hazard. Bureau of Mines Contract J0387229 covers investigation of this noise through laboratory tests of simulated cutting operations and through in-mine noise measurements. The results of these investigations indicate that coal cutting noise and conveyor noise are dominant sources of mining machine operational noise. Typical noise levels for both cutting and conveying operations are approximately 97 dBA (decibels A-weighted). For full operation of all machine systems, the overall sound pressure level is approximately 101 dBA. In-mine and laboratory test results show excellent agreement in both A-weighted overall levels as well as in A-weighted one-third-octave band spectra.
Author : Anonim
Publisher : Unknown
Page : 1048 pages
File Size : 44,8 Mb
Release : 1983
Category : Power resources
ISBN : UIUC:30112018073749
Author : United States. Bureau of Mines
Publisher : Unknown
Page : 648 pages
File Size : 45,7 Mb
Release : 1982
Category : Mineral industries
ISBN : UOM:39015026557788
Author : Anonim
Publisher : Unknown
Page : 450 pages
File Size : 49,9 Mb
Release : 1982
Category : Mine safety
ISBN : STANFORD:36105110634578