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Modern mining processes involve prospecting for ore bodies, analysis of the profit potential of a proposed mine, extraction of the desired materials, and final reclamation or restoration of the land after the mine is closed. [2] Mining materials are often obtained from ore bodies, lodes, veins, seams, reefs, or placer deposits.
Mineral processing is the process of separating commercially valuable minerals from their ores in the field of extractive metallurgy. [1] Depending on the processes used in each instance, it is often referred to as ore dressing or ore milling .
Surface gold mine with haul truck in foreground, in Kalgoorlie, Australia. Mining in the engineering discipline is the extraction of minerals from the ground. Mining engineering is associated with many other disciplines, such as mineral processing, exploration, excavation, geology, metallurgy, geotechnical engineering and surveying.
Underground mining (soft rock) There are three directions by which an underground mine may be conducted: Drift mining, mining horizontally; Shaft mining, mining vertically; Slope mining, mining at an inclined angle Stoping is the process of extracting out the ore from underground, leaving a hole called a stope; Room and pillar; Longwall mining ...
After the water has cycled through the mining process, it is discharged as effluent. The effluent or drainage is acidic due to the presence of sulfuric acid. Acid-rich water drainage can lead to environmental implications including contaminated drinking water and disruption of aquatic environments near the mining site. [36]
Sediment plumes from the some mining processes are a major concern. Once valuable materials are taken extracted, slurry sediment plumes are sometimes pumped back into the sea. That can harm filter ...
Gold mining is the extraction of gold by mining. Historically, mining gold from alluvial deposits used manual separation processes, such as gold panning. The expansion of gold mining to ores that are not on the surface has led to more complex extraction processes such as pit mining and gold cyanidation. In the 20th and 21st centuries, most ...
Hydraulic mining is a form of mining that uses high-pressure jets of water to dislodge rock material or move sediment. [1] In the placer mining of gold or tin , the resulting water-sediment slurry is directed through sluice boxes to remove the gold.