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New Miner Training

New Miner Training. Rock Dusting in Coal Mines. Purpose of Rock Dusting. Prevent the initiation of or propagation of a coal dust explosion. Assists with illumination. What is rock dust?. Pulverized limestone Shall not contain more than 5% quartz or free silica

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New Miner Training

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  1. New Miner Training Rock Dusting in Coal Mines

  2. Purpose of Rock Dusting • Prevent the initiation of or propagation of a coal dust explosion. • Assists with illumination.

  3. What is rock dust? • Pulverized limestone • Shall not contain more than 5% quartz or free silica • 100% will pass through a twenty mesh screen and 75% will pass through a 200 mesh screen • Bulk or Bags (40 lbs)

  4. How is it applied? • Bulk dust is applied by pressurized air tanks pushing rock dust through a hose. • The dust is then sprayed on to the mine roof, ribs and floor. • Trickle dusters. • By hand or shovel.

  5. When and where is it applied? • As soon as possible following the extraction of coal at the working face. • Along belts where coal dust accumulates. • In return air ways. • Along intake travel ways and haulages.

  6. Emergency use • Placed at areas where combustible materials are stored. ( oil stations, emergency materials locations etc.) • Rock dust is applied to small fires.

  7. Personal protective equipment • Respirators. • Well fitted. • Correct filters. • Cleaned and maintained.

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