Mining processing machinery conveyors and crushers

Mine processing methods
The method used in processing a mine is determined by whether it is a surface mine or an underground mine. Surface mining methods include open-pit mining, quarrying (shallower than open pits), strip mining (removing overlying soil and rock from seam of mineral), placer mining (mining alluvial deposits through hydraulic mining usually) and mountaintop removal. Underground mining includes methods such as drift mining (horizontal tunnels from hillsides), slope mining (shaft travels downwards towards the coal seam), shaft mining (vertical tunneling from top) and borehole mining (accessing minerals via high pressure water jets). Other methods include: drift and fill mining, long hole stope mining, sublevel caving, block caving, room and pillar mining, longwall mining and retreat mining.

Mining conveyors and crushers
A rock crusher is a machine designed to take large rocks and reduce them to smaller rocks, gravel, or rock dust. Rock crushers produce aggregates and ready-to-process mining ores, as well as rock fill material for landscaping and erosion control.
At some operations, all the crushing is accomplished in one step, by a single crusher. At other operations, crushing is done in two or more steps, with a primary crusher that is followed by a secondary crusher.
The raw material is usually delivered to the primary crusher by dump trucks, excavators or wheeled front-end loaders. A feeder device such as a conveyor or vibrating grid controls the rate at which this material enters the crusher, and often contains a preliminary screening device which allows smaller material to bypass the crusher itself to improve efficiency.
Different types of crushers include the jaw crusher, gyratory crusher, impact crusher (Horizontal Shaft Impactor and Vertical Shaft Impactor), and cone crushers.