中国矿山工程

The new 1^# ore fines recovery shaft of Longshou Mine has been run for many years, the underground environment is damp, the elevator cab and shaft bottom facilities are severely rusty, the elevator cannot meet the requirement on safe production operation due to frequent failures; the rock integrity near the shaft is poor, the geostress is large, some local sections are misplaced and deformed, so an overhaul is badly needed; through tech-economical argumentation, decision is made that the elevator shaft is upgraded and the single rope winding type cage shaft is selected. In this article, emphasis is put on the discussion of construction process in terms of upgrading scheme and construction technology, the mutual impacts between production and construction are minimized. The practical and reliable safety assurance measures are taken to ensure the smooth completion of the project, which are both cost saving and time saving, and have accumulated valuable experience for future upgrading and utilizing waste and old mining shafts.