Backfilling Materials and Methods for Stress Transfer Modification in Deep Longwall Mines

Details

• Personal Author:
  Jude, Charles V. ; Vandergrift, Thomas L.
• Description:
  This U.S. Bureau of Mines report presents a review and evaluation of existing and new backfilling materials and methods for their applicability to the problem of gate road stress reduction in deep retreat longwall coal mines. Candidate backfill materials include pulverized coal combustion fly ash, flue gas desulfurization, and fluidized bed combustion by-products from coal-fired electric power generation plants. Properties of both backfill and its component materials are presented, with particular emphasis on the unconfined compressive strength and elastic modulus of backfill mixtures. Hydraulic mix designs discussed in this report include high-water content slurry and low-water content paste fills. [Description provided by NIOSH]
• Subjects:
  Mining Occupational Health Safety
• Keywords:
  Coal-mines; Fly-ash; Combustion-products; Waste-products; Mixtures; Grouting; Injection; Displacement; Strata-control; Stress-intensity-factors; Compressive-strength; Hydraulic-characteristics; Mechanical-properties; Underground-mining; Mining-engineering; Longwall-mining; Backfilling; Stress-analysis; Waste-utilization; Fill-materials
• Series:
  Mining Publications
• Subseries:
  Information Circular
• Document Type:
  Text
• Genre:
  Pamphlet or Booklet
• 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:
  1-32
• NIOSHTIC Number:
  nn:10012557
• NTIS Accession Number:
  PB96-115662
• Citation:
  Denver, CO: U.S. Department of the Interior, Bureau of Mines, IC 9433, 1995 Jan; :1-32
• Federal Fiscal Year:
  1995
• Peer Reviewed:
  False
• Source Full Name:
  Denver, CO: U.S. Department of the Interior, Bureau of Mines, IC 9433
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:bdaa7283912aa2862463d3d86fcd433626acadf2a6e894e194caa534f1e814abc632311d1e40f8ecaa7a4273680cf7ba698f01bff93b26329d10a1a9fde8906e
• Download URL:
  https://stacks.cdc.gov/view/cdc/235651/cdc_235651_DS1.pdf
• File Type:
  [PDF - 1.82 MB ]