Explore: Overburden (mine Wastes)

In mining, overburden (also called waste or spoil) is the material that lies above an area that lends itself to economical exploitation, such as the rock

the earth. Open-pit mines are used when deposits of commercially useful ore or rocks are found near the surface where the overburden is relatively thin

indefinitely. Freeport's official response is that overburden is placed in the highlands as part of its Overburden Management Plan, at "sites capped with limestone

stockpile overburden, to break and remove rocks of various hardness and toughness, to process the ore, and to carry out reclamation projects after the mine is

uneconomic fraction (gangue) of an ore. Tailings are different from overburden, which is the waste rock or other material that overlies an ore or mineral body

needed] The life of some area mines may be more than 50 years. The contour mining method consists of removing overburden from the seam in a pattern following

mitigating acid mine drainage. The largest waste by volume - especially in open pit mining - is usually overburden which is either used to fill the mine back in

overlying soil and rock (the overburden); this activity is also referred to as overburden removal. It is most commonly used to mine coal and lignite (brown

chemical stabilization of mine waste is the limit of mine remediation. As part of the life cycle of a surface coal mine, completed mine areas must undergo rehabilitation

because limestone in the overburden neutralizes acid before the drainage emanates. [citation needed] When the pH of acid mine drainage is raised past 3