Report of Investigations 9091: Three-Dimensional Shield Mechanics

Details

• Journal Article:
  Bureau of Mines, Pittsburgh, Pennsylvania. Pittsburgh Research Center
• Personal Author:
  Barczak, Thomas M. ; Burton, W. Scott
• Description:
  This Bureau of Mines report describes research on developing technology to utilize shields as roof load monitors. Three- dimensional equations of static equilibrium are presented for a generic two-legged longwall shield. The equations are presented in the most general form, assuming a force and moment vector at each reaction by rigid-body analysis of the shield mechanics. The resulting system of equations was found to be indeterminate to a very high degree. A three-dimensional solution to measurement of the resultant reaction on the canopy by the strata activity and shield response required the elimination of several forces or moments that were thought to be nonparticipating or to not significantly affect overall shield mechanics. Required measurements for solution of the equilibrium equations were leg, canopy capsule, and lemniscate link forces. Two-dimensional analysis, which considered forces acting only in the roof-to-floor and face-to-waste plane, was also provided by reduction of the three- dimensional equations. [Description provided by NIOSH]
• Subjects:
  Mining Occupational Health Safety
• Keywords:
  Mathematical-models; Structural-analysis; Mechanical-measurement; Equilibrium-methods; Underground-coal-mining; Mineral-industries
• Source:
  BoM, 1987 :23 pages
• Series:
  NIOSH Numbered Publications   ; Mining Publications  
• Subseries:
  Report of Investigations
• Document Type:
  Text
• Genre:
  Report
• Place as Subject:
  OSHA Region 3 ; Pennsylvania
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Division:
  PRC - Pittsburgh Research Center
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Pages in Document:
  27 pdf pages
• NIOSHTIC Number:
  nn:10005719
• NTIS Accession Number:
  PB88-109749
• Federal Fiscal Year:
  1987
• Peer Reviewed:
  False
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:3ad612e2f70b8f851fe3f24c803b9456cbbe55e82c11379e35a625aee4c03c0cee664bc445ed3fb256906db8244fe98363e5d1aa21afe57e6f7b9b028e39bf0c
• Download URL:
  https://stacks.cdc.gov/view/cdc/10749/cdc_10749_DS1.pdf
• File Type:
  [PDF - 998.75 KB ]