Section 145(4) in The Coal Mines Regulations, 2011
(4)Every stopping erected to isolate or control a fire or spontaneous heating belowground or to seal off goaf or an area of old working shall be numbered, and shall be of adequate strength and so maintained as to prevent any leakage of air or gas through it:Provided that where water is likely to accumulate behind any such stopping there shall be provided in the stopping a suitable pipe or other device to drain away the water without permitting any leakage of air or gas, etc.
