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Development of a Fly Ash-Cement Mine Sealing System

Public Domain


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  • Personal Author:
  • Description:
    This report describes the development of a system which modifies an existing fly ash-foam remote mine sealing technique to make it capable of impounding water in a fire zone. Laboratory-scale determinations were made of the capillarity, permeability, and cement. Leakage tests (1/4-scale) indicated that shrinkage in fly ash-cement mixtures always result in leakage, whereas fly ash- bentonite mixtures were impervious to water. Large-scale leakage tests with a 15-foot water head showed that a 1:1 fly ash-bentonite bulk seal with a 2-inch top layer of 1:1 fly ash-huron cement is the optimum combination for a water-tight seal; a froth foam topping is suitable for providing an air-tight seal. A water leakage rate of about 1.5 Gpm is predicted for the optimum combination of the above sealants in a typical mine with a 15-foot water head. Guidelines are given for determining the quantities of materials required for constructing a mine seal. [Description provided by NIOSH]
  • Subjects:
  • Series:
    Mining Publications
  • Subseries:
    Open File Report
  • Document Type:
    Text
  • Genre:
  • CIO:
    National Institute for Occupational Safety and Health (NIOSH)
  • Division:
    PRC - Pittsburgh Research Center
  • Topic:
    Workplace Safety & Health
  • Location:
    North America
  • Pages in Document:
    1-113
  • NIOSHTIC Number:
    nn:10000507
  • NTIS Accession Number:
    PB-250611
  • Citation:
    NTIS: PB 250 611 Available for Reference At Bureau Libraries; :1-113
  • Federal Fiscal Year:
    1975
  • Performing Organization:
    Foster-Miller Associates
  • Peer Reviewed:
    False
  • Source Full Name:
    NTIS: PB 250 611 Available for Reference At Bureau Libraries
  • Collection(s):
  • Main Document Checksum:
    urn:sha-512:be068230f84c2ff5e11d0d91290a2f1984f10b751cadbfcb1b60c253ae487f0a2ce0797e0a2cbb91b116d837127617b7a736bdeb6f7c34ccec05a00b888ca14b
  • Download URL:
  • File Type:
    Filetype[PDF - 13.02 MB ]
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