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Henderson Mine Site. Henderson Mine. Shaft Collar Elev 10,400 ft. Harrison Mt. Elev. 12,300 ft. Shaft Bottom Elev 7,500 ft. LA Ramp. Exhaust air. Fresh air. To crusher. Primary Access Ramp 3600 ft. Secondary Access Ramp 3200 ft. Central Campus Elev. 6,750 ft (4200 mwe).

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Presentation Transcript
central campus

Shaft Collar

Elev 10,400 ft

Harrison Mt.

Elev. 12,300 ft

Shaft Bottom

Elev 7,500 ft

LA Ramp

Exhaust air

Fresh air

To crusher

Primary Access Ramp

3600 ft

Secondary Access Ramp

3200 ft

Central Campus

Elev. 6,750 ft

(4200 mwe)

Central Campus

UNO

deep access

EarthLab/

Geoscience

Area

Central Campus

Elev. 6750 ft

(4200 mwe)

Midway Campus

Elev. 5825 ft

(5100 mwe)

Lower Campus

Elev. 4900 ft

(6000 mwe)

Deep Access

Internal Shaft

2 3 1 conventional development
2.3.1 Conventional Development

Basic drilling cycle for drill and blast drifting and tunneling:

  • Surveying and setup
  • Drilling
  • Charging
  • Blasting
  • Ventilation
  • Scaling
  • Mucking
  • Scaling
  • Bolting
slide14

Sandvik Tamrock

Rock World, 2/2001

Drilling the ventilation raises at the Kiruna Mine, 1998

slide16

Shaft Boring Machine

(Wirth)

V-mole method

Raise bored pilot hole 1.8 to 2.4 m diameter.

Ream shaft to up to 8.5 m diameter.

Limited by maximum length raise bored hole, currently 1,300 m.

7.5 m day average