# The Coal and Other Safety-Lamp Mines (Explosives) Regulations 1993, Regulation 20: Restrictions on the drilling and charging of shotholes


(1) Any person who drills a shothole shall ensure that it is not placed or drilled into any charge or socket remaining from a previous shot.
(2) A person shall not charge a shothole unless it is safe to do so.
(3) A person shall not charge a shothole as part of a delay round unless–
(a) he inserts the primed cartridge first with the detonator at the back of the shothole; and
(b) he has allowed for suitable delay periods between the shots having regard to the circumstances of the particular case.
(4) A person shall not charge a shothole or different shotholes in a round with primed cartridges which contain explosives or detonators of a different type from those used in the remainder of the charge or round concerned.
(5) A person responsible for charging a shothole shall ensure that–
(a) where necessary, the back of the shothole is plugged with stemming material;
(b) the shothole is stemmed with a sufficient amount of suitable stemming material; and
(c) any tool inserted into a charged shothole is made of wood or of an anti-static material.

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Source: https://www.legislation.gov.uk/uksi/1993/208/regulation/20 (the official version)
Page: https://openlegislation.uk/coal-and-other-safety-lamp-mines-explosives-regulations-1993/regulation-20
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.