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Water-jet-assisted roadheaders.

Authors
Timko-RJ; Johnson-BV; Thimons-ED
Source
Pittsburgh, PA: U.S. Department of the Interior, Bureau of Mines, IC 9108, 1986 Jan; :1-11
Link
NIOSHTIC No.
10005332
Abstract
Water-jet-assisted cutting involves the use of a mechanical cutting bit in combination with a high-pressure water jet directed just in front of the bit tip. Such a jet can offer benefits in terms of improved cutting, reduced dust and fines, and improved bit wear. The Bureau of Mines, through a contract with the British National Coal Board, has researched the use of water-jet-assisted cutting on roadheaders. After several engineering design problems were overcome, this program led to the successful underground testing of these roadheaders. Today, more than 60 water-jet-assisted roadheaders are in operation around the world, and numerous others are on order. This paper details the evolution of these machines and the benefits to be gained by their use.
Keywords
Room-and-pillar-mining; Tunneling-machines; Underground-mining; Piston-pumps; Mining; Rock-extraction; Hydraulic-jets; Mining-equipment; Mineral-industries; Hydraulic-and-pneumatic-equipment
Publication Date
19860101
Document Type
IH; Information Circular
Fiscal Year
1986
NTIS Accession No.
PB87-167615
NTIS Price
A02
Identifying No.
IC-9108
NIOSH Division
PRC
Source Name
Pittsburgh, PA: U.S. Department of the Interior, Bureau of Mines, IC 9108
State
PA
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