U.S. flag An official website of the United States government.
Official websites use .gov

A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS

A lock ( ) or https:// means you've safely connected to the .gov website. Share sensitive information only on official, secure websites.

i

Air-lift Hydrohoist--a Unique Coal Transportation System.

Public Domain


Details

  • Personal Author:
  • Description:
    A research program has been initiated by the U.S. Bureau of Mines to reduce the safety hazards of transporting coal from deep underground mines by using an air-lift hydrohoist. The coal air-lift hydrohoist is a system of hydraulically hoisting a coal-water slurry from the mine level to the surface with the assistance of compressed air. Experimental models are being used to define basic performance and operational characteristics of a coal air-lift hydrohoist before the system is attempted in an active underground coal mine. A description of a 7-m-high test model and demonstration unit is presented. Test results indicate that compressed air added upstream of a simulated coal injector will reduce the injection time by increasing the total flow past the injector. Air also assists the hydrohoisting of coal by reducing the overall density of the three- phase mixture in the riser pipe. Results from the 7-m-high test model support an expansion of research to develop and test a 60-m- high pilot-scale model of a coal air-lift hydrohoist prior to commercial-scale testing of the system. [Description provided by NIOSH]
  • Subjects:
  • Series:
    Mining Publications
  • Document Type:
    Text
  • Genre:
    Journal Article
  • CIO:
    National Institute for Occupational Safety and Health (NIOSH)
  • Division:
    DRC - Denver Research Center
  • Topic:
    Workplace Safety & Health
  • Location:
    North America
  • NIOSHTIC Number:
    nn:10007723
  • Citation:
    Proc Int'l Symp on Unique Underground Structures Csm Press 1990 :74-1to74-18
  • Federal Fiscal Year:
    1990
  • Peer Reviewed:
    False
  • Source Full Name:
    Proc. Int'l Symp. on Unique Underground Structures; Csm Press, 1990, PP. 74-1 to 74-18
  • Collection(s):
  • Main Document Checksum:
    urn:sha-512:7dc847c09aedf140bc731323e8446b4703641ae07d6ad9e7b7238120dab30b8f7dcaa9b938d34d035f87873a0fe7fec262d5d13dcaf290925445e82b6de3b57d
  • Download URL:
  • File Type:
    Filetype[PDF - 168.02 KB ]
PREVIOUS
ON THIS PAGE
Details
CDC STACKS serves as an archival repository of CDC-published products including scientific findings, journal articles, guidelines, recommendations, or other public health information authored or co-authored by CDC or funded partners.

As a repository, CDC STACKS retains documents in their original published format to ensure public access to scientific information.
BACK TO TOP