Coal wastes: handling, pollution, impacts, and utilization. Soheil Jahandari, ... Maroun Rahme, in The Coal Handbook (Second Edition), 2023. 4.9.1 Waste rock or overburden. Coal mine waste rock (CMWR) generated in coal mining activities is one of the most significant sources of industrial solid waste. Nearly 4.5 billion tons of CMWR stockpiled in …Web