Test Mine was opened in the 1880s by the Holman Brothers engineering firm
and was developed to showcase and test compressed air rock drills and other
equipment for commercial mining use. Camborne School of Mines utilised the mine
for teaching purposes from the 1920s onwards and took over the mine
completely after the closure of Holmans Ltd, it was used for teaching
until 2017. Since then the mine is now owned and maintained by a private
company and is used as a specialist underground test facility.