Electrical Equipment

1
Electrical Equipment

• Jumbos and Bolters used by McArthur River Mines NT

2
Types of Equipment

• Jumbo
• McArthur River use the Tamrock Twin Boomed
  Minimatic 205-40 Jumbo which is electro
  hydraulically powered.

• Bolter
• McArthur River have two bolters, both electro
  hydraulic Tamrock Robolt 320-30Cs.

3
Minimatic 205-40 Specifications

• The following specifications refer to the general
  dimensions and layout of the jumbo
• Length 12 300mm
• Width 1980mm
• Height (max) 3200mm
• (min) 2350mm
• Weight 19 000kg
• Horizontal tramming 10 km/h
• 17 tramming 4km/h
• Gradeability 13.5
• Noise level 105 dB(A)

4
Minimatic 205-40 Specifications

• Hydraulic boom specifications
• HP 545 Motor/Pump unit
• Electric motor 45 kW 3-phase
• Percussion pumps 130 l/m displacement
  axial pump
• Rotation pump 45 l/m gear pump
• Air and Water System
• Compressor C 1000
• Capacity 1.1m3/min _at_ 7 bar
• Air consumption 200-300 l/min
• Oil consumption 200-300 g/h
• Water pump WBP 2, 4kW

• Electric drilling specifications
• Total input power 108 kW
• Main switch MSE 20
• Standard voltages 380-660V
• Max Voltage 1000V
• Voltage fluctuation 10
• Working lights (4) 500W, 220V
• Driving lights (6) 70W, 24V

5
Minimatic 205-40 Power

• The Jumbos booms are hydraulically controlled
  with the aid of an electrical motor to power
  them.
• The Jumbos get their power via a 50mm trailing
  cable connected to the main power supply and
  passed through an onboard transformer to the
  drilling mechanisms including steel feeder,
  drill withdrawal, drill retrieval and drill
  rotation.
• Required power input into the twin booms is 108
  kW, used to produce voltages of between 380 and
  660. The Jumbos can produce voltages in excess
  of 1000 V.
• Voltage fluctuations associated with the booms
  is estimated to be 10

6
Minimatic 205-40 Safety

• Stringent safety precautions are implemented into
  each Jumbo due to the large voltages produced and
  power inputs.
• These safety precautions include devices such as
• Circuit breakers
• Emergency cut off switches
• Overheating protection
• Insulated power sources
• Overload protection
• Paramount to these devices is the initial
  induction and familiarisation with the equipment
  carried out by all persons iinvolved with the
  machine or its surroundings.

7
Robolt 330-20C

• The following specifications refer to the general
  dimensions and configuration of the Bolters used
  at McArthur River
• Length 11 200mm
• Width 2 600mm
• Height (max) 3 200mm
• (min) 2 350mm
• Weight 16 000kg
• Horizontal speed 10km/h
• 17 slope speed 4km/h
• Gradeability 13.5
• Noise level 97dB (A)

8
Robolt 330-20C

• Hydraulic boom specifications
• HP 545 Motor/Pump unit
• Electric motor 45 kW 3-phase
• Percussion pumps 130 l/m displacement axial
  pump
• Rotation pump 45 l/m gear pump
• Air and Water System
• Compressor C 1000
• Capacity 1.1m3/min _at_ 7 bar
• Air consumption 200-300 l/min
• Oil consumption 200-300 g/h
• Water pump WBP 2, 4kW

• Electric drilling specifications
• Total input power 108 kW
• Main switch MSE 20
• Standard voltages 380-660V
• Max Voltage 1000V
• Voltage fluctuation 10
• Working lights (4) 500W, 220V
• Driving lights (6) 70W, 24V

9
Robolt 330-20C

• As with the Minimatic Jumbo power supply, the
  Robolt is configured exactly the same. The only
  noticeable difference to the two machines is the
  boom mount and number of booms.
• The Bolter has only a single boom and the boom
  mount is fitted with a rotary bolting head.
• The machine is still powered by the same means
  as that of the Jumbo. Both pieces of equipment
  use and distribute their power identically.
• The safety precautions apply to the Bolter as
  they do for the Jumbo

10
Summary

• MRM use electricity in many ways, both as a power
  source for its equipment and as a means for power
  to its three regions, mill, mine and village
• MRM own 6 Minimatic Jumbos, used for hard rock
  drilling underground
• These Jumbos are both electrically and
  hydraulically powered
• MRM run 2 Robolt bolters, used in hard rock
  ground support
• The Robolt Bolters, similarly to the Jumbos, are
  electro hydraulically driven
• Safety concerning the use of electrical equipment
  at MRM is of a high and stringent standard
• Each piece of equipment is fitted with cut of
  devices, overload switches, circuit breakers and
  insulation