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Operation of Large U/G Fans at Kidd Mine

Operation of Large U/G Fans at Kidd Mine. Kingsley Hortin. 10 th June 2008. Ventilation is a safety ENABLER !. Surface Ventilation Infrastructure. #2 Shaft. #1 Shaft (and BAC). NVS Exhaust Fans. Refrigeration Plant. Portal. Open Pit (Cold Stope Intake). #1 Mine. Kidd Mine. 850m.

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Operation of Large U/G Fans at Kidd Mine

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  1. Operation of Large U/G Fans at Kidd Mine Kingsley Hortin 10th June 2008

  2. Ventilation is a safety ENABLER!

  3. Surface Ventilation Infrastructure #2 Shaft #1 Shaft (and BAC) NVS Exhaust Fans Refrigeration Plant Portal Open Pit (Cold Stope Intake)

  4. #1 Mine Kidd Mine 850m #2 Mine 1400m #3 Mine Phase I 6000 Level Booster Fans #3 Mine Phase II 2070m Block 1 Mine D Stage 1 Block 2 Block 3 Mine DStage 2 3100m

  5. #4 Booster Fan • For Each Booster Fan: • Axial fan - 4000 HP motor • Variable pitch in motion blade adjustment • Design Operating Point: 450m³/s @ 5.0kPa • Actual Operating Point: 360m³/s @ 4.2kPa

  6. Operating Parameters • Motor Weight: 33 950 lbs • Rotor Assembly : 11 000 lbs • Shaft & Coupling: 3 250 lbs • Housing Assembly: 23 500 lbs • Diffuser and Transition: 31 460 lbs • Outlet Damper: 11 000 lbs Over 50t !!!

  7. Select Design Criteria • The fans would be operating in semi-parallel operation to each other and in series with the installed surface fans. • All four fans (surface & U/G) should operate in any permissible combination and be logically controlled. • Barometric Pressure 116 kPa related to surface pressure of 98.5 kPa. • Design density of 1.39 kg/m³. • The fan will operate 24 hrs/day and 7 days/week with overall availability of 97%. • 2.4m wide x 2.4m high x 6.0m long as an individual component or • 3.5m wide x 2.0m high x 6.0m long as a complete skid package

  8. 6000 Level Plan Excavation Dimensions for Each Fan Approx: 35m (long) x 13m (wide) x 8.5m (high)

  9. Key Dates • Enquiry Sent Out for Bids 30 Apr 04 • TLT Babcock Chosen as Supplier 28 Jun 04 • #4 Fan • Civils Construction Starts 11 May 05 • Fan Installation Starts 24 Jun 05 • Cold Commissioning Starts 12 Sep 05 • Fan Motor Bumped (Uncoupled) 27 Sep 05 • #4 Fan Started 12 Oct 05 • #3 Fan • Civils Construction Starts 18 Jul 05 • Fan Installation Starts 11 Sep 05 • Cold Commissioning Starts 11 Nov 05 • Fan Motor Bumped (Uncoupled) 22 Nov 05 • #3 Fan Started 15 Dec 05

  10. Real Time Monitoring - Intranet

  11. Real Time Monitoring - PI

  12. Bearing Failure

  13. Potential Causes • Nearby Long Hole Blasting • Blast design changed • Fan left running during blasting • Improper Fan Operating Procedures • Start & Stop procedures changed • Electrical Fluting • Extra grounding added to both fan and intermediate shaft • Insulated shafts

  14. Any Questions?

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