Coal age

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  Año 2005, Vol. 110, Número 12

  • FEATURE ARTICLES

    • Reducing roof fall accidents on retreat mining sections: Developing and following a mining plan, and using equipment properly could reduce miner exposure to ground falls

      Joseph C. Zelanko, Christopher Mark

      págs. 26-31

      

    • Spiral concentrators recover fine coal: Compound spirals offer better performance in a more efficient configuration

      Steve Fiscor

      págs. 32-34

      

    • Good seal construction and ventilation controls improve airflow

      págs. 36-38

      

    • Age discrimination protection is not limited to seniors

      Gregory J. Ossi

      pág. 39