Section 133(11) in The Coal Mines Regulations, 2011
(11)In the case of a shaft in the course of being sunk, the competent person or chargeman shall...(a)have entire charge of the shaft bottom and shall, in his shift, remain in the shaft while persons are at work at the bottom of the shaft.(b)be the last person to ascend the shaft at the end of the shift and if his shift is succeeded immediately by another shift, he shall not leave the bottom of the shaft until after the descent of the chargeman of the succeeding shift; and(c)after each round of shots, and at the beginning of every shift, and after every cessation of work in the shaft for a period exceeding two hours, examine the sides of the shaft and remove all loose pieces before persons are allowed to descend.
