1 / 21

SLOPE & SHAFT SINKING TEAM

NOISE PROJECT. SLOPE & SHAFT SINKING TEAM . Shafts Conventional Drill, Blast, Muck or Clam-Shell Drill - Either Raise-Bore or Blind-Drill. Slopes Conventional Drill, Blast , Muck (Air or Diesel) Continuous Miner Cut. PROJECT TYPES.

chinue
Télécharger la présentation

SLOPE & SHAFT SINKING TEAM

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. NOISE PROJECT SLOPE & SHAFT SINKING TEAM

  2. Shafts Conventional Drill, Blast, Muck or Clam-Shell Drill - Either Raise-Bore or Blind-Drill Slopes Conventional Drill, Blast , Muck (Air or Diesel) Continuous Miner Cut PROJECT TYPES Several different types of shaft/slope sinking methods employed:

  3. PROJECT CONSIDERATIONS • Determine where objective noise levels could be evaluated • Very few current projects available • Short duration of most projects • Logistics for team members • Use of specialized equipment • Initial visit and evaluation of projects • Recommend changes or improvements • Follow up on recommendations

  4. PROJECT SITE VISITS • Sampled noise levels at different jobs • Determined noise exposures • Evaluated noise sources • Determined if any noise controls were being utilized • Determined their effectiveness • Determined if hearing protection used

  5. PROBLEM AREAS • In Slopes/Shafts where air-powered equipment is used • During drilling, mucking, air-cleaning operations • On surface area near stationary equipment • In vicinity of hoists, compressors and ventilation fan • Ambient or background noise in the shafts/slopes

  6. RESULTS OF MINE VISITS • Air-Powered Equipment Drilling 111 dBA to 124 dBA Mucking 98 dBA to 110 dBA Air cleaning 100 dBA to 110 dBA • Surface Installations Hoists 99 dBA to 103 dBA Compressors 84 dBA to 98 dBA Fans 85 dBA to 93 dBA • Ambient Noise in Shafts/Slopes Range 87 dBA to 94 dBA

  7. Air-Powered Drills - BEFORE -Heavy Cumbersome Designs -No noise considerations -111dBA to 124dBA

  8. Air-Powered Drills - NOW - Jacketed Body - Light-weight materials - Improved Engineering Designs - Improved noise level ranges 111-118 dBA

  9. MUCKERS Poor muffler systems 98DbA TO 110DbA

  10. New Mucker/Loader Designs Diesel or Hydraulic Muckers Backhoemodified 101 dBA Alternate Loading Methods Clam-Shell 83 dBA

  11. Drilling - Recommendations • Always use mufflers to reduce internal hammer noise • Use smallest diameter drill steel needed • Collar holes before applying full air pressure • Regulate air pressure to manufacturer specifications

  12. Mucking - Recommendations • Use equipment mufflers as provided by manufacturer • Reduce operating air pressure • Monitor and regulate air pressure • Keep equipment properly serviced and well lubricated • Explore alternative powered muckers (diesel, hydraulic) or methods of loading (Clam-shell)

  13. Surface Installation -Recommendations • Use prudent site planning to locate equipment away from work areas and entrances to slopes/shafts • Provide sound deadening enclosures • Provide noise barriers • Equip fans with inlet and exhaust silencers

  14. Ambient Noise -Recommendations • Use prudent site planning to locate equipment away from openings • Use flexible connections to stop fan noise transmission • Use insulating hangers or anchors to install fan tubing • Explore different types of fan tubing, sound deadening tubing/fan blades

  15. Hoist Installations - Before Noise levels ranged from 99 dBA to 103 dBA

  16. New Hoist Installations Sound deadening in operators cab. Hoist noise < 70.3 dBA

  17. Fan Installations - Improved New Fan Designs Silencers and Isolation surround 83 - 85 dBA

  18. Compressor Installations Before: 93- 98 dBA After: 92-95 dBA Effective Isolation Barriers

  19. Improved Compressor Design Manufacturer’s applied noise reduction technology 83 dBA

  20. Future Plans • Continue to monitor shaft/slope sinking projects (both conventional and drilling types) • Measure effectiveness of new site layout plans • Pursue and encourage new equipment developments • Share findings/results with industry

  21. Future Plans • Visited shaft sinking site using backhoe adapted mucker design (Feb 7-8) • Test an improved low dBa air-powered drill (March 13-14) • Visit slope sinking project using diesel scoops for mucking operation (projected March) • Survey and Review Metal/Non Metal Shaft/Slope sinking sites for different methods/technologies (projected Feb-March)

More Related