Report of Investigations 9066: Pillar Load Transfer Associated with Multiple-Seam Mining

Details

• Journal Article:
  MISSING
• Personal Author:
  Chekan, Gregory J. ; Galek, James A. ; Matetic, Rudy J.
• Description:
  The Bureau of Mines, as part of a program to improve mine planning and development, is currently investigating the effects of pillar load transfer, which can impact mining operations within a multiple- seam configuration. At two minesites where such ground interactions were present, the Bureau performed a complete geological analysis and installed and monitored instrumentation to gather pertinent data on rock mechanics. Overburden depth varied dramatically in the vicinity of the study area and reached a maximum at the study site; innerburden thickness was less than a pillar width (40 to 45 ft); heaving was experienced in both mines where sandstone and/or shale floor units were observed; overlays of the mine layouts show pillars were not totally superpositioned; a maximum of 5 in of roof to floor convergence was measured; and pressure readings indicated pillar core loading only and increased to a maximum of 7,000 psig over instrument setting pressure. [Description provided by NIOSH]
• Subjects:
  Mining Occupational Health Safety
• Source:
  MISSING :23 pages
• Series:
  NIOSH Numbered Publications   ; Mining Publications  
• Subseries:
  Report of Investigations
• Document Type:
  Text
• Genre:
  Report
• Place as Subject:
  United States
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Division:
  PRC - Pittsburgh Research Center
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Pages in Document:
  28 pdf pages
• NIOSHTIC Number:
  nn:10005540
• Federal Fiscal Year:
  1987
• Peer Reviewed:
  False
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:d28edaac67c1a2bf5c14d80a7d78d3dace3a454cda1c85fe7fb19320f8328e05fe0622b986b86779ba1e7e5acd9478f5c0b8389f57323a7479f7b51f4bb78fa0
• Download URL:
  https://stacks.cdc.gov/view/cdc/10626/cdc_10626_DS1.pdf
• File Type:
  [PDF - 10.49 MB ]