"Coal slurry" refers to a thick mixture of coal particles and liquid (usually water). It is created by combining crushed coal with water to transport or store it. Full definition
In Martin county Kentucky in 2000, three - hundred million gallons of toxic coal slurry spilled out into the adjacent streams and rivers. (rachelheldevans.com)
The mining process produces a waste known as coal slurry which is impounded behind earthen dams in the valleys of the former mountains. (rachelheldevans.com)
Exposure to the slurry of water and other chemicals formed after coal is washed would be more dangerous to human health than exposure to MCMH — and there have been numerous coal slurry floods and spills in West Virginia and U.S. history. (scientificamerican.com)