32.1.5.All workers should be withdrawn from underground workings if:
(a)the ventilation fails; or
(b)other imminent danger threatens.
32.1.6.Parts of underground workings found to be dangerous should be fenced off.
32.1.7. A telephone system should be maintained from the vicinity of the face of underground workings to the surface with
stations at intermediate workplaces.
32.1.8.In underground workings that are Wet, the workers should be provided with waterproof clothing and boots.
32.1.9,In tunnels and other underground workings where an explosive mixture of gas such as methane and air may form, operations should be carried on in accordance with national or other official regulations applying to gassy mines.
32.1.10.In these cases referred to in paragraph 32.1.9, in particular:
(a) all electrical equipment and conductors should be flameproof or intrinsically safe