Section 208(1) in The Coal Mines Regulations, 2011
(1)The number of shots which explode shall, unless shots are fired electrically, be counted by the shotfirer and any another competent person authorised for the purpose and unless it is certain that all the shots have been exploded, no person shall re-enter or be permitted to reenter the place until 30 minutes after the firing of shots:Provided that where shots are fired electrically, this interval may be reduced to not less than five minutes after the source of electricity has been disconnected from the cable.
