Development of a jet-assisted cutterhead for coal-measure rocks. Mining research contract report
Technical Report
·
OSTI ID:5438214
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 bit. 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% were obtained with jet assist. Also observed was a drastic reduction in airborne dust when jets were employed.
- Research Organization:
- Colorado School of Mines, Golden (USA). Earth Mechanics Inst.
- OSTI ID:
- 5438214
- Report Number(s):
- PB-86-217692/XAB
- Country of Publication:
- United States
- Language:
- English
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