Mining Cables

1
Mining Cables

• James Lovelock 100016955

2
Cable Standards

• Must Conform to three standards
• AS/NZS 1802 Reeling and trailing For
  underground coal mining purposes.
• AS/NZS 1972 Underground coal mines Other than
  reeling and trailing.
• AS/NZS 2802 Reeling and trailing for mining and
  general use (other than underground coal mining).

3
Cable Types

• Reeling Trailing cables for underground coal
• Cables for general use (excluding shuttle cars)
• Cables for general use (including shuttle cars)
• Cable for hand-held boring machines
• Cables for shuttle cars

4
General Use excluding shuttle Cars
Type 240 Cross Section

• Construction
• Cradle
• Power Cores
• Pilot Core
• Sheath
• Example 209.2 Type 209, rating 2.2/2.2 kV

5
General Use Including Shuttle Cars

• 280B Only cable specified under AS
• More protection of main assemblage

6
Hand Held Boring Machines

• Cable 210 only cable specified by AS
• Thinner cable lower voltage designation

7
Shuttle Car Cables

• Only Cable recommended is type 275 by AS
• Thicker outer sheath and reinforcement

8
Mining Cables Use other than underground coal

• Divided into two classes
• Class 1 High grade insulation smaller
  insulation/sheath thickness, 3.3/3.3 kV and above
  voltage designation, for slow reeling or
  trailing, high flexibility.
• Class 2 Greater thickness insulation, robust,
  flexible, rated at 1.1/1.1 kV and above, for
  reeling and trailing.

9
Class 1 Example Type 441

• Pilot core in centre of cradle separator
• Power cores surround pilot conductor
• Screens
• Earth conductor
• Assembly filling

10
Class 2 Example Type 409

• Uses composite screen as earth conductor
• Greater sheath thickness

11
Cables other than reeling and trailing for
underground coal mines

• Cables for fixed apparatus
• Armoured Cables
• Feeder Cables
• Machine Cables
• Mine Shaft Winder Cables

12
Handling Management of Reeling Trailing Cables

• HAZRDS
• Open Arching
• Equipment Explosion
• Potential injury from projectiles, burns, death
• Indirect Contact
• Direct Contact

13
Accident Causes

• Poor Maintenance and Repair
• Inappropriate work practices
• Wrongful selection of cable for intended
  application
• Poor Operation Standard

14
Safety Precautions

• Reduce Cable Damage
• Implement cable management systems
• Reduce manual handling wear protective gloves
  when doing so
• Enforce standard operating procedures
• Frequent cable inspection/testing/repair
• Only use cables which meet Australian Standards

15
Conclusions

• Three Australian Standards to conform to
• Coal Mines adhere to more stringent guidelines
• Safety high importance cables up to 22kV rating
  high potential for hazard
• Handling of cables important
• Safe under normal working conditions