Active intake ventilation shaft of Zakłady Górnicze Rudna, situated within the Rudna Zachodnia copper mining district near Polkowice, Lower Silesia.
Shaft R-IV is an intake ventilation shaft forming part of the Rudna Zachodnia district of Zakłady Górnicze Rudna, the largest copper ore mine in Europe and an operating division of KGHM Polska Miedź S.A. situated north of Polkowice in Lower Silesia. The shaft stands immediately adjacent to shaft R-III, the two together forming the core of the western sub-district of ZG Rudna. R-IV serves a fresh-air intake function for the underground workings and has associated hoist equipment.
It was built as part of the original mine development in the early-to-mid 1970s, consistent with the commissioning sequence of other shafts in the Rudna Zachodnia area. The shaft was confirmed in service in mine infrastructure documentation from 2019. As part of one of the world's deepest and most productive copper mining complexes, its surface infrastructure remains active within the operational KGHM system.
Shaft R-IV is a ventilation shaft of the intake type (szyb wdechowy), located in the Rudna Zachodnia extraction district of Zakłady Górnicze Rudna, approximately 75 metres from shaft R-III. The two shafts, together with shaft R-X, constitute the shaft complex of this western district of the mine.
Zakłady Górnicze Rudna was established as a mine under construction in September 1969, and ground freezing operations began in 1970 ahead of shaft sinking. Shafts in the Rudna Główna area were sunk from 1971 to 1972, and preparatory works for the Rudna Zachodnia district were undertaken concurrently. The mine was officially opened on 17 July 1974. R-III, the companion haulage shaft of the same district, was commissioned in 1973. R-IV, as part of the same western district infrastructure, was constructed within the same development programme, though a precise commissioning year specific to R-IV has not been identified in the consulted sources.
As an intake shaft, R-IV functions by drawing fresh air into the underground workings to supply the ventilation circuit serving the Rudna Zachodnia production area. The shaft also carries hoist equipment, as confirmed by a Wyższy Urząd Górniczy report of 26 June 2019 concerning an electrical fault at the KRZ Rudna Zachodnia high-voltage substation, which recorded that hoist equipment at R-IV and R-X was supplied from one transformer bank and that equipment at R-III was supplied from another.
ZG Rudna operates copper ore extraction in the polymetallic deposit of the Legnica-Głogów Copper District, with ore bodies lying at depths of 900 to 1,244 metres beneath the surface. The mine has maintained annual output of around 12 million tonnes of ore and remains one of the largest and deepest underground copper mines in the world. As of the dates available in the consulted sources, R-IV remains an active component of this operational system.