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- Mining and agglomeration of hard coal [Includes under ground or open-cut mining of anthracite, bituminous or other hard coal; cleaning, sizing, pulverizing and other operations to improve the quality; operations to recover hard coal from culm banks; manufacture of briquettes or other solid fuels consisting chiefly of hard coal and in-situ gasification of coal.] (7)
- Mining and agglomeration of lignite [Includes under ground or open-cut mining of lignite (brown coal); cleaning, sizing, pulverizing and other operations to improve the quality; and manufacture of briquettes or other solid fuels consisting chiefly of lignite.] (1)