Section 164(1) in The Coal Mines Regulations, 2011
(1)Every auxiliary fan,-(a)shall be installed, located and worked in such a manner that-(i)a sufficient quantity of air shall, at all times, reach it so as to ensure that it does not re-circulate air;(ii)there is no risk of the air which it circulates being contaminated by any substantial quantity of inflammable or noxious gases or dust; and(b)shall, whether driven electrically or otherwise, be efficiently connected with earth so as to avoid the accumulation of an electrostatic charge;(c)shall have an approved type of air-duct for conducting the air to or from the face or blind end; and(d)such air-duct shall be so maintained as to minimize any leakage or air and to ensure an adequate supply of air to within 3.0 metres of the face or blind end.
