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Support Capabilities of Pneumatically Stowed Materials

Public Domain


Details

  • Personal Author:
  • Description:
    Ground support for metal, nonmetal, and coal mines was examined through fill placement with a pneumatic stower to increase extraction, reduce ground pressures, and improve general mine safety. Several pneumatically stowed stope-fill products were tested to determine the effects of specific gravity, gradation, moisture, and impact velocity on the in-place density of the stowed fill. Hydraulic sand filling has now served the mining industry for several decades but because of the low density does not always provide ample support to the hanging wall; therefore, the sill and crown pillars sometimes build up excessive stresses that are detrimental to mining. Cementation of a dense fill adjacent to a pillar to allow 100-pct extraction of the pillar, or a fill that can be placed without the use of water and where water is a detriment to rubber-tired mining equipment, was found to be a possible use of pneumatic fill. Placing of coal mine washery products into abandoned underground workings is another possibility in order to completely eliminate surface impoundments. [Description provided by NIOSH]
  • Subjects:
  • Series:
    Mining Publications
  • Subseries:
    Report of Investigations
  • Document Type:
    Text
  • Genre:
  • CIO:
    National Institute for Occupational Safety and Health (NIOSH)
  • Division:
    SRC - Spokane Research Center
  • Topic:
    Workplace Safety & Health
  • Location:
    North America
  • Pages in Document:
    1-48
  • NIOSHTIC Number:
    nn:10000986
  • NTIS Accession Number:
    PB-263563
  • Citation:
    NTIS#: PB 263 563; :1-48
  • Federal Fiscal Year:
    1976
  • Peer Reviewed:
    False
  • Source Full Name:
    NTIS#: PB 263 563
  • Collection(s):
  • Main Document Checksum:
    urn:sha-512:730550ec5b5c5dc8cc42bc349a87433f73aac02e93ae92553a6baeda0920b2e72465a00fadf8c066f212314831ac6061abeb3957fcc5d84567dbb1984d4f2e60
  • Download URL:
  • File Type:
    Filetype[PDF - 4.35 MB ]
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