" means the ratio of the volume of overburden moved to the tonnage of coal produced, measured in terms of BCM of overburden per tonne of coal produced. A lower strip ratio is an operational advantage because less overburden has to be removed in order to expose the raw coal."
The ratio of waste (overburden material that covers mineable ore) to ore; used to define the quality of an oil sands ore body.
the tonnage or volume of waste material which must be removed to allow the mining of one tonne of ore in an open pit
The ratio of tons of overburden waste material to tons of ore in an open pit mine. The waste rock removed in order to expose the orebody in an open pit mine is hauled only once to a waste disposal area, in contrast to strip mining where waste rock is replaced to reclaim the flat lying mined-out area.
The tonnage of non-mineralized waste material removed to allow the mining of one tonne of ore in an open pit. Also referred to as waste-to-ore ratio.
