NRE Support Rig

Efficiency through fully automated cycle

NRE SUPPORT RIG AT GLANCE

EFFICIENCY THROUGH FULLY AUTOMATED CYCLE

The purpose of NRE Support Rig is to install self drilling roof bolts (SDR’s) to hanging wall of narrrow reef stopes. It is possible for operator to perform all functions from a safe operating distance. Its robust design, small dimensions, low noise level, and nil gaseous emission make this machine the most suitable tool for underground applications. The NRE Support Rig is battery power driven and operated by remote control.

KEY FEATURES

The NRE Support Rig is designed to work in stoping widths from 0.9, to 1.7m, and can work in reef inclinations of up to 22°. The NRE Support RIg has a dual tool configuration, allowing 2 bolts to be drilled, installed and resin injected simultaneously. Its lightweight, stand-alone remote control allows the operator to remain at a safe operating distance during the production process.

VIDEO SYSTEM

SUPPORT RIG TOOL

  • • Adjustable and efficient two tools
    simultaneous automated operation

RESIN PUMPING SYSTEM

STANDARDISATION

  • • Common prime mover for drill rig/support rig
  • • Standardisation of internal electronic components (stock levels reduced)

HIGH MOBILITY

  • • Low profile tracks

EASY MAINTENANCE ACCESS

  • • Divided compartments (hydraulic, power, control)

ELECTRIC DRIVE

  • • No gas emission reduces ventilation requirements
  • • Low noise

HEIGHT 660 mm

  • • Ultra low profile dimensions allows access to confined areas

REMOTE CONTROL CAPABILITY

  • • Allows operators to remain at a safe distance while operating machine

1. VIDEO SYSTEM 2. SUPPORT RIG TOOL

  • Adjustable and efficient two tools simultaneous automated operation

3. RESIN PUMPING SYSTEM 4. STANDARDISATION

  • Common prime mover for drill rig/support rig
  • Standardisation of internal electronic components (stock levels reduced)

5. HIGH MOBILITY

  • Low profile tracks

6. EASY MAINTENANCE ACCESS

  • Divided compartments (hydraulic, power, control)

7. ELECTRIC DRIVE

  • No gas emission reduces ventilation requirements
  • Low noise

8. HEIGHT 660 mm

  • Ultra low profile dimensions allows access to confined areas

9. REMOTE CONTROL CAPABILITY

  • Allows operators to remain at a safe distance while operating machine

EFFICIENCY

Single button automated supporting cycle

2 x tools (drills simultaneously)

Installation bolt length - 1.6m to 2.4m

SDR segment length: 400mm, up to 6 SDR segments per single bolt installation cycle

Bolt installation time: 2 bolts (1.6m) installed in 8 minutes simultaneously

Camera system per tool

Adjustable tool kinematics

Support pattern flexibility (1m -2 m)

Rotary drilling (controlled advance rate)

Narrow reef prime mover platform

Interchangeable support rig and drill rig tool attachments

GALLERY

TECHNICAL DATA

Dimensions
Prime Mover 4150 x 1976 x 745 mm
Toolset 2185 x 1950 x 793 mm
Tool Width (single) 935 mm
Ground clearance
Clearance 130 mm
Weight
Prime Mover 10 000 kg
Toolset 3000 kg
Power system
Battery Type LiFePO4
Battery Pack Nominal Voltage 346 V DC
Working off the electrical grid via trailing cable 380 – 550 VAC 3ph
On board fast charger
Charging time 1 hour
Charging source 380 – 550 VAC 3ph
Support tool characteristics
Number of tools 2
Type of drilling Rotary drilling
Maximum drill thrust force 40 kN
Support cycle (2 bolts, 1.6 m ea.) 8 min

NRE Equipment Suite

Industry: Underground mining
Customer: One of the world’s largest mining companies (South African market)
Challenges: Impossibility to fully mechanize the mining cycle (drill, blast, clean & support) in the narrow reef mining equipment which is a very labour intensive, unsafe and inefficient
Customer’s requirements: Development of a fully electrically powered and remotely controlled equipment which will ensure the full mechanization of the mining cycle
Results: Developed electrically powered and remotely controlled NRE Equipment Suite which provides health and environmental benefits of clean power technologies

 

  • Who is the customer and what industry does it belong to?

In 2008, DOK-ING was approached by Anglo American to develop electrically powered equipment which could operate in working heights as low as 900 mm in narrow reef mining environments. Anglo American is one of the largest diversified mining houses in the world.

 

 

  • What were the challenges the customer faced? Why was it necessary to develop a new machine? Why the existing solutions on the market could not be used?

At the time when DOK-ING was appointed to develop this equipment, it was not possible to fully mechanize the mining cycle (drill, blast, clean & support) in the narrow reef mining environment. Traditionally, mining in narrow reef ore bodies is a very labour intensive, unsafe and inefficient process. In order to improve narrow reef mining safety and efficiency, remotely controlled, mechanized mining equipment was selected by Anglo American to make this possible.

 

 

  • What were the requirements of the customer, what kind of machine did they want to develop for themselves?

The client required suitably sized <650 mm in height equipment, which was fully electrically (battery) powered and could be operated at a safe distance from the working face. The development commenced with the prototype for battery powered Dozer utilized in the cleaning cycle. Afterwards, prototypes for the drill rig were completed and tested. Finally, a support rig (roof bolter) was developed and tested, ensuring the full mechanization of the mining cycle could be achieved by means of remotely controlled equipment. This suite of equipment can operate in the stoping width of between 0.9 m and 1.7 m at working angles of up to 22°.

 

 

 

  • What is the result of the whole process? What kind of machine has been developed? What are its characteristics and advantages over other solutions on the market?

By 2019, a 3rd generation of the full suite of NRE equipment had been produced and is now ready to roll out in narrow reef mining operations within Anglo American and other mining houses. The NRE Suite comprises of the following equipment:

 

 

  • NRE Dozer Prime Mover
  • NRE Dozer Blade/ Bucket Attachment
  • NRE Sweeper Attachment
  • NRE Drill Rig/ Support Rig Prime Mover
  • NRE Drill Rig Tool Attachment
  • NRE Support Rig Tool Attachment

  Currently, there is no other company in the world which has developed and tested a complete suite of electrically powered, remotely controlled equipment. The main benefits of this equipment are as follows:

 

 

  • Ability to mine in working areas as low as 0.9 m (reduction of dilution – increase in mined grade – g/t)
  • Remotely executed mechanized mining activities
  • Safety improvement – removing personnel from working in hazardous areas
  • Health and environmental benefits of clean power technologies
  • Cost benefits of having the same prime mover and various tool attachments and standardization of equipment interchangeable parts.