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Coal Mining Safety and Health Regulation 2017
sec.220Where explosive-powered tools may be used
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### sec.220 Where explosive-powered tools may be used
The person directly supervising and controlling the use of an explosive-powered tool at an underground mine must ensure the place where the tool is used has the following features—
a general body concentration of methane of less than 0.5%;
its exposed surfaces within a radius of 20m from where the tool was fired are—
thoroughly saturated with water; or
treated with stonedust so the deposited dust mixture comprises an incombustible coal dust concentration of at least 85%.
- (a) a general body concentration of methane of less than 0.5%;
- (b) its exposed surfaces within a radius of 20m from where the tool was fired are— (i) thoroughly saturated with water; or (ii) treated with stonedust so the deposited dust mixture comprises an incombustible coal dust concentration of at least 85%.
- (i) thoroughly saturated with water; or
- (ii) treated with stonedust so the deposited dust mixture comprises an incombustible coal dust concentration of at least 85%.
- (i) thoroughly saturated with water; or
- (ii) treated with stonedust so the deposited dust mixture comprises an incombustible coal dust concentration of at least 85%.