Coal mining is the process of extracting coal from the ground. Coal is valued for its energy .. This block of coal may be drilled and blasted (if hard) or otherwise loaded onto trucks or . Coal wash plant in Clay County, Kentucky . Continuous mining utilizes a Continuous Miner Machine with a large rotating steel drum.
Barrier pillars are solid blocks of coal left between two mines or sections of a mine to .. Canopy A protective covering of a cab on a mining machine. to remove fly ash from the gases prior to the release from a power plant's smokestack.