Additives for Strengthening Backfill Materials in Steep Coal Seam Mining

Details

• Personal Author:
  Aggson JR ; Brechtel, C. E. ; Thies DA
• Description:
  A testing program was conducted to design a cemented backfill for hydraulic placement in underhand cut-and-fill mining of a steeply dipping coal seam. The testing evaluated the use of three different backfill aggregates, locally available at the coal mine, with portland cement and five different pozzolans, including a class f fly ash, a class c fly ash, a cement kiln dust, and ground smelter slag. Both viscosity and uniaxial compressive strength of backfill mixtures with different pozzolan and portland cement contents were used to evaluate their suitability. Based upon the results of preliminary testing, an optimum mixture of alluvial sand with 6% portland cement and 10% class f pozzolan was chosen for further compression testing. [Description provided by NIOSH]
• Subjects:
  Coal Coal Mining Mining Occupational Health Safety
• Keywords:
  Mining-industry; Coal-mining; Testing-equipment; Fly-ash; Cements; Compression-tests
• Series:
  Mining Publications
• Subseries:
  Open File Report
• Document Type:
  Text
• Funding:
  Contract
• Genre:
  Conference Publications ; Final Contract 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:
  1-116
• NIOSHTIC Number:
  nn:10005193
• NTIS Accession Number:
  PB86-215894
• Citation:
  NTIS: PB/86-215894,1985; :1-116
• Federal Fiscal Year:
  1985
• Performing Organization:
  J. F. T. Agapito and Associates, Inc.
• Peer Reviewed:
  False
• Source Full Name:
  NTIS: PB/86-215894
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:63f5f08fd3e9723f08d37ceadbb7f6b2f540fffadc800b6e864a6a4b131356e0b20369d1045d2d8c31449784dfcb9d6bddf2a068ed320576c52dfac93a740834
• Download URL:
  https://stacks.cdc.gov/view/cdc/234343/cdc_234343_DS1.pdf
• File Type:
  [PDF - 2.97 MB ]