A sinker in

mining Mining is the extraction of valuable minerals or other geological materials from the Earth, usually from an ore body, lode, vein, seam, reef, or placer deposit. The exploitation of these deposits for raw material is based on the economic via ...

in the 19th century was a worker who specialized in creating new vertical

mine shaft Shaft mining or shaft sinking is the action of excavating a mine shaft from the top down, where there is initially no access to the bottom. Shallow shafts, typically sunk for civil engineering projects, differ greatly in execution method from ...

s. The job was highly skilled and the workers who did this work were often regarded as an elite workforce.

References

Mining terminology {{mining-stub