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National Institute for Occupational Safety and Health National Institute for Occupational Safety and Health
National Institute for Occupational Safety and Health

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  • Geologic investigations of underground coal mining problems
    Filetype[PDF - 1.13 MB]
    Personal Author:
    McCulloch, C. M. (Charles M.) ; Jeran, P. W. ; ...
    Corporate Authors:
    United States. Bureau of Mines.
    Published Date:
    1975
    Series:
    Report of investigations (United States. Bureau of Mines) ; 8022
    Description:
    "A series of geological surveys were completed in six coal mines in connection with a Bureau of Mines research program on methane control. The aim of ...
    File Type:
    Filetype[PDF - 1.13 MB]
    File Type:
    Filetype[PDF - 1.13 MB]
  • Circuit Protection; Technical Bulletin Pager Phones
    Filetype[PDF - 207.46 KB]
    Corporate Authors:
    Arthur D. Little, Inc. ; United States. Bureau of Mines.; ;
    Published Date:
    January 1975
    Series:
    C-77212
    Description:
    "Wires leading to or from underground facilities can develop hazardous voltages because of lightning exposure. The locations of many mine portals are ...
    File Type:
    Filetype[PDF - 207.46 KB]
    File Type:
    Filetype[PDF - 207.46 KB]
  • Use of Vacutainers for collection of mine atmosphere samples
    Filetype[PDF - 394.08 KB]
    Personal Author:
    Freedman, Robert W. ; Humphrey, William G. ; ...
    Corporate Authors:
    United States. Bureau of Mines.
    Published Date:
    1975
    Series:
    Report of investigations (United States. Bureau of Mines) ; 7999
    Description:
    "As part of a continuing effort to reduce the weight and bulk of equipment that mining personnel must carry underground, the Bureau of Mines and the M...
    File Type:
    Filetype[PDF - 394.08 KB]
    File Type:
    Filetype[PDF - 394.08 KB]
  • Commercial-quality gas from the multipurpose borehole located in the Pittsburgh coalbed
    Filetype[PDF - 1004.15 KB]
    Personal Author:
    Fields, H. H. ; Perry, John H. ; ...
    Corporate Authors:
    United States. Bureau of Mines.
    Published Date:
    1975
    Series:
    Report of investigations (United States. Bureau of Mines) ; 8025
    Description:
    "This report describes a multipurpose borehole used for both degasification and the production of commercial-quality gas. The multipurpose borehole wa...
    File Type:
    Filetype[PDF - 1004.15 KB]
    File Type:
    Filetype[PDF - 1004.15 KB]
  • Hydraulic stimulation increases degasification rate of coalbeds
    Filetype[PDF - 801.61 KB]
    Personal Author:
    Elder, Curtis H. ; Deul, Maurice. ;
    Corporate Authors:
    United States. Bureau of Mines.
    Published Date:
    1975
    Series:
    Report of investigations (United States. Bureau of Mines) ; 8047
    Description:
    "Coal degasification boreholes drilled from the surface have been successfully hydraulically stimulated to increase the flow of gas from the coal. Thi...
    File Type:
    Filetype[PDF - 801.61 KB]
    File Type:
    Filetype[PDF - 801.61 KB]
  • Measuring the methane content of bituminous coalbeds
    Filetype[PDF - 844.41 KB]
    Personal Author:
    McCulloch, C. M. (Charles M.) ; Levine, J. R. ; ...
    Corporate Authors:
    United States. Bureau of Mines.
    Published Date:
    1975
    Series:
    Report of investigations (United States. Bureau of Mines) ; 8043
    File Type:
    Filetype[PDF - 844.41 KB]
    File Type:
    Filetype[PDF - 844.41 KB]
  • Two-phase flow in coalbeds
    Filetype[PDF - 606.80 KB]
    Personal Author:
    Kissell, Fred N. ; Edwards, John C. ;
    Corporate Authors:
    United States Bureau of Mines.
    Published Date:
    1975
    Series:
    Report of investigations (United States. Bureau of Mines) ; 8066
    Description:
    "Experimental work by the Bureau of Mines indicates that when a coalbed is degassed by boreholes, the flow of methane may actually increase with time....
    File Type:
    Filetype[PDF - 606.80 KB]
    File Type:
    Filetype[PDF - 606.80 KB]
  • Technical bulletin pager phones - installation.
    Filetype[PDF - 438.19 KB]
    Corporate Authors:
    Arthur D. Little, Inc. ; United States. Bureau of Mines. ;
    Published Date:
    April 1975
    Description:
    "The pager phones used in many underground coal mines are battery operated, party-line telephones with provisions for loudspeaker paging. The system i...
    File Type:
    Filetype[PDF - 438.19 KB]
    File Type:
    Filetype[PDF - 438.19 KB]
  • Technical services for mine communications research. Task A, Task order no. 1. Applicability of state-of-the-art voice bandwidth compression techniques for wireless mine communication
    Filetype[PDF - 4.30 MB]
    Personal Author:
    Spencer, R. H. ; Bender, W. G. ;
    Corporate Authors:
    Arthur D. Little, Inc. ; United States. Bureau of Mines. ;
    Published Date:
    July 1975
    Series:
    Open file report (United States. Bureau of Mines) ; 20(3)-76
    Description:
    "The applicability of voice bandwidth compression techniques to mine wireless communication systems is examined. Promise has been attached to such tec...
    File Type:
    Filetype[PDF - 4.30 MB]
    File Type:
    Filetype[PDF - 4.30 MB]
  • Applicability Of State-Of-The-Art Voice Bandwidth Compression Techniques For Wireless Mine Communication - I. Executive Summary - A. Introduction
    Filetype[PDF - 4.30 MB]
    Personal Author:
    Spencer, Richard H. ; Bender, Warren G. ;
    Corporate Authors:
    Arthur D. Little, Inc. ; United States. Bureau of Mines. ;
    Published Date:
    7/1/1975
    Series:
    Technical services for mine communications research. Task A, Task order no. 1
    Description:
    Since the passage of the Coal Mine Health and Safety Act of 1969, the Bureau of Mines has made many advances in mine communications. These efforts hav...
    File Type:
    Filetype[PDF - 4.30 MB]
    File Type:
    Filetype[PDF - 4.30 MB]
  • Noise reduction of a pneumatic rock drill
    Filetype[PDF - 4.76 MB]
    Personal Author:
    Visnapuu, Aarne ; Jensen, James W. ;
    Corporate Authors:
    United States. Bureau of Mines.
    Published Date:
    1975
    Series:
    Report of investigations (United States. Bureau of Mines) ; 8082
    Description:
    "Experimental modifications have been made by the Bureau of Mines on standard pneumatic rock drills to reduce the noise of the air exhaust, drill stee...
    File Type:
    Filetype[PDF - 4.76 MB]
    File Type:
    Filetype[PDF - 4.76 MB]
  • Selected geologic factors affecting mining of the Pittsburgh coalbed
    Filetype[PDF - 3.68 MB]
    Personal Author:
    McCulloch, C. M. (Charles M.)
    Corporate Authors:
    United States. Bureau of Mines.
    Published Date:
    1975
    Series:
    Report of investigations (United States. Bureau of Mines) ; 8093
    Description:
    "As part of the Bureau of Mines methane control program, the Pittsburgh coalbed was studied in Washington and Greene Counties, Pennsylvania, and in Ma...
    File Type:
    Filetype[PDF - 3.68 MB]
    File Type:
    Filetype[PDF - 3.68 MB]
  • Rotary drilling holes in coalbeds for degasification
    Filetype[PDF - 1.69 MB]
    Personal Author:
    Cervik, Joseph. ; Fields, H. H. ; ...
    Corporate Authors:
    United States. Bureau of Mines.
    Published Date:
    1975
    Series:
    Report of investigations (United States. Bureau of Mines) ; 8097
    Description:
    "Coal is a soft and brittle material. Drilling rates in the Pittsburgh coalbed using a drag bit exceed 3 ft/min at 2,500-pound thrust. However, mainta...
    File Type:
    Filetype[PDF - 1.69 MB]
    File Type:
    Filetype[PDF - 1.69 MB]