Section 56(1)(l) in The Coal Mines Regulations, 2017
(l)at any entrance into a shaft or inset which is provided with gates or fences not worked by the cage or other means of conveyance, not begin to remove the gate or fence until the cage or other means of conveyance has stopped at the entrance, and shall close the gate before he has signalled the cage or other means of conveyance away, and he shall not permit any unauthorised person to open or interfere with the gate;