A winze is an opening in an underground mine that is sunk downward (as opposed to a raise, which is mined upward) from inside to connect lower levels. The top of a winze is located underground, in contrast to a shaft, where the top of the excavation is located on the surface. ...
small ventilating shaft between two levels of a mine
• (n.) A small shaft sunk from one level to another, as for the purpose of ventilation.
(from the article `mining`) ...raise-boring machines. The openings so created may be used as ore passes, waste passes, or ventilation openings. An underground vertical opening ...
Secondary or tertiary vertical or near-vertical opening sunk from a point inside a mine for the purpose of connecting with a lower level or of exploring the ground for a limited depth below a level.
Winze noun (Mining.) A small shaft sunk from one level to another, as for the purpose of ventilation. 
Secondary or tertiary vertical or near-vertical opening sunk from a point inside a mine for the purpose of connecting with a lower level or of exploring the ground for a limited depth below a level.
a vertical or inclined shaft, driven downward from a drift into an ore body to another level. (see raise)
An internal shaft.
A vertical or inclined opening sunk from a point inside a mine.