mechanised decline development M.M.S. (mechanised mucking system)

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mechanised decline developmentM.M.S. (mechanised
mucking system)
excavator controls power pack
excavator in park position under jumbo
Bomar Projects (Pty) Ltd.
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mechanised decline development MMS Forward

• Decline development is presently labour intensive
• Speed of bringing shafts into operation is
  critical
• Steep declines (15 or more) are slow
  problematic

Bomar Projects
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mechanised decline development MMSConcept
design considerations

• Capable of operating in the range of 10 and 40
• Have a relatively fast mode of exchanging
  hoppers/skips
• To improve safety
• The ability to move with the advancing face under
  its own power
• Have the option of conveyor belt utilisation for
  declines to 15 degrees

Bomar Projects
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mechanised decline development MMSDescription

• A self propelled unit that comprises of the
  following main components
• Hydraulically operated system, designed to move
  a platform and all the components mounted
  thereon
• Built in facilities for rolling stock
• Conveyor, if applicable, for declines of 15 or
  less
• Hopper/skip exchange slave winch
• Hydraulic lateral jacks to anchor the platform
• Stop blocks for hoppers/skips
• Hydraulic excavator
• Blast protection chain screen
• Up ramp and rail track installation apparatus
• Hydraulic portal drill rig for mechanised
  drilling option or handheld drill machine bay
• Safety features for excavator, hopper, drillrig
  movements
• Water tanks positive displacement pumps to
  dispose of water delivered by the face pump/s

Bomar Projects
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mechanised decline development MMSGeneral
Arrangement (with skips)
Bomar Projects
Rail magazine
Skip in park position
Portal jumbo
Skip being loaded
Loader
Hydraulic slide floor
Blast screen
For system with conveyor belt see video available
on request
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mechanised decline development MMSSpecification

• Max component size 9.1m x 0.5m x 1.45m
• Heaviest component 5000kg
• Installed power 102kW (for drillrig add 40kW to
  110kW, for pumps add 22kW to 75kW)
• Hydraulics 2 circuits/ 900 lt capacity. Pump
  pressure/flow compensated, piston
• Operating pressure 150 - 210 bar
• Voltage 525 - can be designed to suit
• Excavator traverse speed 1m per second
• Speed of slide floor cylinders 0.5m per minute
• Excavator slew Max 5 rpm, 45 45
• Effective mucking capacity per hour (0.4m3
  bucket - 20m3 or 32t) (0.5m3 bucket - 25m3 or
  40t) (0.6m3 bucket - 30m3 or 49t)
• Face shovel - bottom discharge
• Totally enclosed sliding floor of 3 main section.
  Width length to suit specific requirements. The
  width of the excavation will determine the set up
  of mucking i.e. conveyor or hopper for
  inclination of 15 or less hopper or skip for
  greater inclinations. Hydraulic jacks
  incorporated in the main sections and are applied
  to the sidewalls when expanding the slide floor
  to follow face advance

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mechanised decline development MMSAncillary
equipment

• A submersible face pump to supply the permanent
  Tank/pump/s on the MMS via permanent floor pipes
• Slave winch to lower the empty skip to excavator
• Hydraulic lifting apparatus to shift skip from
  main line to wait line
• Rail magazine situated at the rear of the sliding
  floor for easy and rapid installation of
  permanent rails
• Slewing hydraulic crane at rear for material
  handling
• Bays provided for tools, hoses, drilling
  consumables and spares.

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mechanised decline development MMS Safety

• Excavator operator canopy
• No lashing personnel required in front
• Lock bell system for hopper/skip
  arrival/departure
• Hopper/skip stop blocks, rails and switches
• Excavator carriage - power off/out, brakes on
• Advantages
• Advance rates 100 faster in applications where
  the inclination is in excess of 15 degrees with
  capital and operating costs relatively lower than
  other methods now in use
• The ability of the MMS to allow for the
• installation of rail tracks and/or
• conveyor concurrently with the sinking
• to meet the permanent equipping
• requirements of the client

Bomar Projects (Pty) Ltd E.MAIL info_at_bomar.co.za
TEL [phone] FAX [phone]