Klosterbusch mine, Coal mine in Querenburg district, Bochum, Germany.

Klosterbusch mine is a former coal mine in the Querenburg district of Bochum, in the lower Lottental valley south of the Ruhr University. Its above-ground buildings, including the office building and washhouse that later housed the university library, stand empty. The adjacent quarry on the Kalwes hill is Bochum's largest geological exposure and is protected as a natural monument.

The Vereinigte Klosterbusch mining union, originally an iron-ore concern in Essen-Werden, acquired the Sonnenschein, Johann-Diedrich and Buchwald coal mines in Querenburg in 1918. Two inclined shafts opened that year, followed by a vertical shaft in 1924, a ventilation shaft in 1937 and another on Haarstraße in 1955; output reached a depth of 368 metres. The colliery closed on 31 July 1961.

The mine is on the Route der Industriekultur, theme route Bochum, since March 2014, and the Bergbauwanderweg Ruhr-Universität passes the site. The surviving office building and adjoining washhouse (Waschkaue) housed the Ruhr University library before campus buildings were finished, and university geology institutes later used them. From 1991 to 1994 and again in October 1995 the neighbouring administration buildings were occupied by student squatters.

The quarry face on the Kalwes is a protected natural monument (ND 2.5) and is not open to the public for safety reasons; the grounds in front serve as a trial plot and composting area for the Ruhr University botanical garden. Guided tours are offered on certain occasions. The Bergbauwanderweg Ruhr-Universität, listed in the Route der Industriekultur since March 2014, passes the site; the surviving day buildings stand empty and are slated for demolition.

The cable car built in 1920 ran to a loading station on the Ruhrtalbahn near the Zeche Holland in Herbede, on the other side of the Ruhr valley. Foundations of its support pillars can still be made out in the fields. One of the two inclined shafts now houses a broadband seismic station of the Ruhr University, part of the German Regional Seismological Network.