NRE Dozer

Productive, safe and zero emissions

NRE DOZER AT GLANCE

PRODUCTIVE, SAFE AND ZERO EMMISIONS

The NRE Dozer is a very low profile remotecontrolled machine with the aim to increase safety and productivity in material handling operations. The NRE Dozer is designed to work in stoping widths from 0.9 m, and has the ability to work in reef inclinations of up to 25°. Main purpose of NRE Dozer is to push ore from a blasted panel into the advanced strike drive (ASD). The NRE Dozer can also be used to perform cleaning backlog ore/sweepings, roadways cleaning and panel entrances (holing) cleaning.

KEY FEATURES

Its robust design, small dimensions, small turning radius, low noise level and nil gaseous emission make this machine the most suitable tool for underground applications.

REMOTE CONTROL CAPABILITY

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

DIFFERENT TASKS

  • • Exchangeable front tool

QUICK TOOL ATTACHMENT

  • • Universal coupling

STANDARDISATION

  • • Common prime mover for blade/bucket/sweeper
  • • Standardisation of internal electronic components (stock levels reduced)

EASY MAINTENANCE ACCESS

  • • Divided compartments (hydraulic, power, control)

HIGH MOBILITY

  • • Small turning radius
  • • Low profile tracks

HEIGHT 652 mm

  • • Ultra low profile dimensions allows access to confined areas

ELECTRIC DRIVE

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

INTEGRATED FAST CHARGER

  • • Can be charged by mine standard grid & plugs

1. REMOTE CONTROL CAPABILITY

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

2. DIFFERENT TASKS

  • Exchangeable front tool

3. QUICK TOOL ATTACHMENT

  • Universal coupling

4. STANDARDISATION

  • Common prime mover for blade/bucket/sweeper
  • Standardisation of internal electronic components (stock levels reduced)

5. EASY MAINTENANCE ACCESS

  • Divided compartments (hydraulic, power, control)

6. HIGH MOBILITY

  • Small turning radius
  • Low profile tracks

7. HEIGHT 652 mm

  • Ultra low profile dimensions allows access to confined areas

8. ELECTRIC DRIVE

  • No gas emission reduces ventilation requirements
  • Low noise

9. INTEGRATED FAST CHARGER

  • Can be charged by mine standard grid & plugs

APPLICATIONS

Narrow Reef Mining

Long Hole Drill Mining Set Up

Sweeping and Vamping

Cleaning in Dangerous and Un-supported Areas

Cleaning under Conveyor Belts

Cleaning in Smelters Areas

Accelerated Bridge Construction

Support in Different Construction Applications

Bucket

Purpose: Material loading/unloading and transportation Capacity: 0,65 m³

Blade

Purpose: Pushing, rough cleaning Working capacity: 50 – 120 t/h

Sweeper

Purpose: Fine cleaning, sweeping Coverage: 300 m² / h

GALLERY

TECHNICAL DATA

Dimensions
Prime Mover 3460 x 1558 x 652 mm
Prime Mover with Dozer blade 3650 x 1600 x 652 mm
Prime Mover with Sweeper 4660 x 1620 x 652 mm
Blade
Clearance 130 mm
Weight
Prime Mover 4115 kg
Power system
Battery Type LiFePO4
Nominal Voltage 308 V DC
Battery Capacity Up to 8 h
On board fast charger
Charging time 3 hours
Charging source (voltage) 380 – 550 VAC 3ph
Brakes
Braking System Spring Applied Hydraulic Release
Operating capacity
Sweeper cleaning rate in m2 40 m2/h
Dozer Cleaning rate 50 -120 t per hour

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.