Report of Investigations 9541: Evaluation of an Alternative Longwall Gate Road Design

Details

• Journal Article:
  Denver, CO: U.S. Department of the Interior, Bureau of Mines, RI 9541
• Personal Author:
  Conover, David P. ; Cox, Robert M. ; McDonnell, John P.
• Description:
  This U.S. Bureau of Mines report describes the results from an in-mine investigation of an alternative longwall gate road design. The coal mine operator modified the pillar layout (reversed the location of the big and small pillars) in a portion of a three-entry longwall gate road area. The modified pillar layout was an attempt to reduce stress and, subsequently, stress-related ground control problems (cutter roof and dynamic floor heave events) in the tailgate region during second-panel mining. The results from borehole pressure cells (BPC's) installed in the modified gate road area showed that the ground pressures in the panel edge and adjacent small pillar were significantly reduced during second-panel mining compared to ground pressures experienced in the typical pillar layout gate road areas. The reduced stress levels around the tailgate entry adjacent to the second panel, as compared to the tailgate stress levels with the typical pillar arrangement, contributed to improved tailgate ground conditions in the test pillar zone. [Description provided by NIOSH]
• Subjects:
  • Coal
  • Coal Mining
  • Mining
  • Occupational Health
  • Safety
• Keywords:
  • Coal-mining; Strata-control; Mathematical-models; Caving-mining; Geotechnical-engineering; Rock-mechanics; Soil-mechanics; Underground-mining; Boreholes; Columns-supports; Pressure; Longwall-mining; Mining-engineering; Mine-roadways; Structural-design
• Source:
  Denver, CO: U.S. Department of the Interior, Bureau of Mines, RI 9541, 1995 Jan; :1-23
• Series:
  NIOSH Numbered Publications ; Mining Publications
• Subseries:
  Report of Investigations
• Document Type:
  Text
• Genre:
  Report
• Place as Subject:
  Colorado ; OSHA Region 8
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Division:
  DRC - Denver Research Center
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Pages in Document:
  21 pdf pages
• NIOSHTIC Number:
  nn:20039201
• NTIS Accession Number:
  PB95-200887
• Federal Fiscal Year:
  1995
• Peer Reviewed:
  False
• Download URL:
  https://stacks.cdc.gov/view/cdc/10125/cdc_10125_DS1.pdf
• File Type:
  [PDF - 1.50 MB]
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:9d1289e571a4e422a7b02348e922d7a375d31e1284ef2a12d4175f010a527062addc3634402dcebe25d21e7957c8323cdc140787c35c3317e6371906517f835b