ISO INTERNATIONAL STANDARD 23872 First edition 2021-12 Mining structures Underground structures Structures minieres - Structures souterraines Reference number IS0 23872:2021(E) ISO @IS02021 IS0 23872:2021(E) COPYRIGHT PROTECTED DOCUMENT @ IS0 2021 All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may the internet or an intranet, withoutpriorwrittenpermission.Permission can be requested from eitherIso at the addressbelow or Iso's member body in the country of the requester. ISO copyright office CP 401 · Ch. de Blandonnet 8 CH-1214Vernier,Geneva Phone: +4122 749 0111 Email: [email protected] Website: www.iso.org PublishedinSwitzerland i @ IS0 2021 - All rights reserved

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