ANNEX MINIMUM SAFETY AND HEALTH REQUIREMENTS AS REFERRED TO IN ARTICLE 10 OF THE DIRECTIVE

PART C SPECIAL MINIMUM REQUIREMENTS APPLICABLE TO UNDERGROUND MINERAL-EXTRACTING INDUSTRIES

9. Mines containing flammable dusts
9.4. Propagation of flammable dust and/or firedamp explosions which are liable to trigger further flammable dust explosions must be limited by installing a system of explosion barriers.
The locations of such explosion barriers must be indicated in a document which is brought up to date periodically and held available at the workplace.