# The Mines Regulations 2014, Paragraph 10

Extent: E+W+S

In the case of roadways where rockbolts are used as the principal support—
(a) the minimum density of rockbolts in the roof must be 1 bolt per square metre;
(b) the minimum length of rockbolt in the roof must be 1.8 metres; and
(c) the maximum distance between the last completed row of rockbolts and the face must be 3.5 metres.

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Source: https://www.legislation.gov.uk/uksi/2014/3248/schedule/1/paragraph/10 (the official version)
Page: https://openlegislation.uk/mines-regulations-2014/schedule-1/paragraph-10
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.