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Coal Mining Safety and Health Regulation 2017
sec.334Preventing explosive atmospheres around operating machines
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### sec.334 Preventing explosive atmospheres around operating machines
The underground mine manager for an underground mine must ensure that, while a blind shaft, raise or tunnel borer is operating in a shaft or tunnel at the mine—
the methane content in the shaft or tunnel does not exceed 2%; or
the shaft or tunnel has an inert atmosphere.
- (a) the methane content in the shaft or tunnel does not exceed 2%; or
- (b) the shaft or tunnel has an inert atmosphere.