An abandoned mine is a mine or quarry which is no longer producing or operational, though definitions vary. An abandoned mine may be a hazard to health. The term incorporates all types of old mines including underground shaft mines and drift mines, and surface mines including quarries and placer mining. Abandoned mines are found throughout the world. They contain many hazards to the unwary who venture around them, including. Open-pit, open-cast or open cut mining is a surface mining technique of extracting rock or minerals from the earth by their removal from an open pit or borrow. Open-pit mines that produce building materials and dimension stone are commonly referred to as quarries. 4K UHD 3840×2160 30p.