Slide 1

Mine Ventilation Society

Free State Region

‘Instope” Ventilation Control

Symposium

16 October 2002

Lodewyk Roux

Harmony Gold Mining Company Ltd

“Instope Ventilation Control” Symposium 16/10/2002

When working hard the human body produces heat at the rate of
240w/m²

This heat is then removed by - transferred to the ventilating air

For various wet bulb temperatures the actual velocity required will
vary

I.E.

29.0° Wet Bulb - Velocity = 0.3m/s
30.0° Wet Bulb - Velocity = 0.5m/s
31.0° Wet Bulb - Velocity = 0.9m/s
32.0° Wet Bulb - Velocity = 1.6m/s
32.5° Wet Bulb - Velocity = 2.6m/s

Max allowable WB Temp

33.0° Wet Bulb - Velocity = 4.0m/s

SLIDE 1

“Instope Ventilation Control” Symposium 16/10/2002

Vent Seal

Quantity =20m³/s

Area =10

m²

Velocity =2.0m/s

SLIDE 6

“Instope Ventilation Control” Symposium 16/10/2002

Ventilation Curtain

Pack not sealed

Packs

Open Area at Packs cannot be ignored

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“Instope Ventilation Control” Symposium 16/10/2002

Ventilation Curtain

Gaps in ventilation curtains

Open Area between ventilation control and hanging cannot be
ignored

SLIDE 9

Document Outline