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Development of a Water Jet Assisted Cutterhead for Coal Measure Rocks.

Authors
Ozdemir-L
Source
NTIS: PB 86-217692 :95 pages
Link
NIOSHTIC No.
10005153
Abstract
The results of a laboratory research program aimed at the development of a water jet assisted drag bit cutting system for coal mine applications are presented. Two types of drag bits, a conical and a plow bit, were tested in a hard sandstone rock with jet pressures of up to 20,000 psi. Jet locations investigated were in front of and behind the bits. For each jet mounting location, three jet impingement distances with respect to bit tip were tested. The closest jet impingement location to bit tip was found most effective, providing the greatest force reductions on the bit. Overall, significant bit force reductions up to 50 percent were obtained with jet assist. Also observed was a drastic reduction in airborne dust when jets were employed.
Publication Date
19860101
Document Type
CP; Final Contract Report;
Fiscal Year
1986
NTIS Accession No.
PB86-217692
NTIS Price
A06
Identifying No.
OFR 69-86
NIOSH Division
PRC;
Source Name
NTIS: PB 86-217692
State
CO;
Performing Organization
Colorado School of Mines
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