Page 343 - Advances In Productive, Safe, and Responsible Coal Mining

Index 319

Natural gamma radiation (NGR), 173 Noise-induced hearing loss (NIHL), 215
Nerd culture, 53–54 Noise reduction rating (NRR), 216
New South Wales Mine Safety’s Safety Noise source identification
Management Systems in Mines, 25 continuous mining machines
NIOSH 5040 method, 204–205 chain-tail roller interaction, 237
Nitrogen (N) fertilizer, 285, 290 flight tip-flexplate interaction, 237
No-days-lost accident incidence rate (NDL flight-upper deck interaction, 237
IR), 20 NIOSH hemi-anechoic chamber,
Noise control of mining equipment overhead microphone array, 236, 236f
acoustics modeling, 216–218 secondary sources, flexplate area,
beamforming algorithms, 218–219 237–238, 238f
continuous mining machines tail section area, 237, 237f
constraints, 240 longwall-cutting drums, 222–223
jacketed tail roller, 238–239, 239f roof-bolting machines, 229–230
noise-generating components, 235, 236f NonFatal occurrences with Days Lost
noise source identification, 236–238 (NFDL), 16
in room-and-pillar operations, 235 Nonpermissible diesel equipment, 202
urethane-coated chain flights, Numerical models, 217
238–240, 239f
urethane-coated tail roller,
238–239, 239f O
longwall-cutting drums Office of Surface Mining Reclamation and
components, 220–221, 222f Enforcement, 303–304
constraints, 226–227 Ohm’s law, 84
damping treatments, 224–225 OHSAS 18001 (international), 42
force isolation, 223–224 One-dimensional cutting stock problem,
noise assessments, 221 74–75
noise source identification, 222–223 Open-cast mining, 247–248
numerical models, 221 Ordinary least squares (OLS) linear
shearer operator, location of, 220, 220f regression analyses, 3–4, 5f
standard vs. modified drums, 227–228, Organic Act, 21
228f Organic carbon (OC), 200, 204
stiffeners and ribs, 227, 227f Organizational culture, 34, 38–39, 57
structural modification, 225 Osmotic dehydration, 260
MPA technology, 218 advantages, 263–264
personal protective equipment, 215–216 cost of dewatering, 264
roof-bolting machines laboratory-scale testing, 263–264, 263f
acoustic enclosure/sound barrier, operational parameters, 262–263
232–234 osmotic agent, 262
constraints, 234 principle of, 261–262, 262f
damped drill steel noise control, semipermeable membrane, 262
231–232 Out-of-seam dilution (OSD)
drill bit isolator, 234–235, 240–241 awareness training, 170, 171f
noise source identification, 229–230 control procedure
vibration isolation noise control, advanced engineering controls for
230–231 reducing, 173–175
at source, 215–216 mining cost, 160–161
SPC analysis, 219 modeling gravity separation partition
in transmission path, 215–216 curves, 160