Report of Investigations 8116: Determining Cleat Orientation of Deeper Coalbeds from Overlying Coals

Details

• Journal Article:
  Pittsburgh, PA: U.S. Department of the Interior, Bureau of Mines, RI 8116
• Personal Author:
  McCulloch, Charles M. ; Lambert, Stephen W. ; White, James R.
• Description:
  Examination of several coalbeds in Walker County, Alabama, Cambria, Greene, and Fayette Counties, Pennsylvania, and Caleigh and Wyoming Counties, West Virginia, indicates that cleat orientations are similar throughout a vertical sequence of strata. Studies of cleat orientation were carried out in underground mines that are operating in separate coalbeds vertically above one another. The data show that over a vertical separation of 100 to 400 feet, the average difference in coal cleat orientation between mines is 04 deg for the face and 08 deg for the butt cleat. Variations of coal cleat direction between coalbeds examined in strip-mined areas show similar values. Cleat orientations measured at outcrops agree well with the directions measured underground, suggesting that the amount of vertical separation between coalbeds has little effect on the resulting differences in cleat directions. The largest variation of cleat directions between adjacent coalbeds occurs where a large horizontal distance separates two sample locations. Cleat orientations for deeper coalbeds are most reliable where the data are taken from directly above. [Description provided by NIOSH]
• Subjects:
  Coal Coal Mining Engineering Mining Occupational Health Safety
• Keywords:
  Mine-gases; Mining-industry; Methanes; Methane-drainage; Methane-control; Explosive-gases; Explosive-atmospheres; Underground-mining; Coal-mining; Control-technology; Engineering-controls
• Source:
  Pittsburgh, PA: U.S. Department of the Interior, Bureau of Mines, RI 8116, 1976 Jan; :1-19
• Series:
  Mining Publications   ; NIOSH Numbered Publications  
• Subseries:
  Report of Investigations
• Document Type:
  Text
• Genre:
  Report
• Place as Subject:
  OSHA Region 3 ; Pennsylvania ; West Virginia
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Division:
  PRC - Pittsburgh Research Center
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Pages in Document:
  24 pdf pages
• NIOSHTIC Number:
  nn:10000628
• NTIS Accession Number:
  PB-252326
• CAS Registry Number:
  Methane (CAS RN 74-82-8)
• Federal Fiscal Year:
  1976
• Peer Reviewed:
  False
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:b7d06030dba32c7c39123c66312b1497fb064dfc2a25d1894481583cf198e2e2cb55407bfa20b4d3f7156c4a6064705451613cf03cdf06eadd48a8fe7d88f08f
• Download URL:
  https://stacks.cdc.gov/view/cdc/9243/cdc_9243_DS1.pdf
• File Type:
  [PDF - 866.77 KB ]