OCCUPATIONAL HEALTH AND SAFETY — coal mine workplace accident — worker crushed between the toe of an automatically advancing roof support and the sides of the continuous armoured face conveyer — high risk of being crushed by powered roof support as they automatically advance towards the coalface — slipping and falling in the walkway — being struck by fly rock when dislodged from the Shearer — whether preventative measures taken by the mine were sufficient — whether prosecution has proved beyond reasonable doubt that the preventative measures pleaded would have eliminated the risk — whether activating tilt switches in remote control units for Shearers necessary — previous incident known to the defendant — forseeable risk of injury
