Improved performance of linear coal cutting compared with rotary cutting
Book
·
OSTI ID:99279
The linear cutting system, developed by the US Bureau of Mines uses geometric principles developed by Cardan to produce a nearly constant cut depth. The new system has been extensively tested in a synthetic material under laboratory conditions to verify mechanical capability and to identify operational characteristics. Comparison between 15-rpm linear cutting and 50-rpm rotary cutting systems show significant improvement in respirable dust entrainment, product size distribution, and energy usage. Respirable dust is reduced by as much as 90%. Recovered product showed a 67% reduction in {minus}0.32-cm ({minus}1/8-in) material and a 200% increase in +5.08 cm (+ 2 in) materials. Average power was reduced by 66% for the linear cutting. Because the bit cutting paths differ between linear and rotary cutting, it was necessary to compare the two at the same cut depths and bit types. These comparisons show that low revolution per minute rotary cutting entrains about the same amount of respirable dust as the linear cutting system, but the average shaft torque may be 55 to 130% greater for the rotary system.
- OSTI ID:
- 99279
- Country of Publication:
- United States
- Language:
- English
Similar Records
Improved performance of linear coal cutting compared with rotary cutting. Report of investigations/1995
Reduction of dust and energy during coal cutting using point-attack bits, with an analysis of rotary cutting and development of a new cutting concept. Report of investigations, 1976
Linear cutting concept improves health and safety for miners
Technical Report
·
Sat Jul 01 00:00:00 EDT 1995
·
OSTI ID:76298
Reduction of dust and energy during coal cutting using point-attack bits, with an analysis of rotary cutting and development of a new cutting concept. Report of investigations, 1976
Technical Report
·
Fri Oct 01 00:00:00 EDT 1976
·
OSTI ID:7322153
Linear cutting concept improves health and safety for miners
Conference
·
Sat Dec 31 23:00:00 EST 1988
·
OSTI ID:6962690