Ventilation fan blades turn to projectiles

A FAILURE in a primary ventilation fan at a Queensland underground metalliferous mine destroyed all fan blades and left palm-sized fragments within a 15 metre radius of the installation.

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Ventilation fan blades turn to projectiles Ventilation fan blades turn to projectiles Ventilation fan blades turn to projectiles Ventilation fan blades turn to projectiles Ventilation fan blades turn to projectiles

The pitch of the fan blades was too high, increasing risk of blade fatigue.

While the fan cowling and evasé were not damaged by the disintegration of the fan components, the fragments were ejected out of the top of the evasé.