Underground mining

thumb|Gated entrance of an abandoned adit near Medford, Oregon, United States

thumb|right|The Kintore Headframe and winding drums in Broken Hill, New South Wales thumb|Headframe at the Great Western Colliery in [[Hopkinstown Wales UK]] thumb|The steel headframe of the Ottiliae shaft (1876) in Clausthal-Zellerfeld, the oldest existing headframe in Germany

vehicle used in underground mining

water that collects in a mine and which has to be brought to the surface by water management methods

stationary engine used to control a cable, for example to power a mining hoist at a pit head

air ventilation for a mine

a form of underground coal mining where a long wall of coal is mined in a single slice

thumb | right A winze is a minor connection between different levels in a mine. When worked upwards from a lower level it is usually called a raise; when sunk downward from a higher level it may be called a sump. The top of a winze is located underground and it is not equipped with winding gear. Rather, the access up and down between levels is usually via ladder. This is in contrast to a shaft, which is a deeper connection between levels and does have winding gear, whether the top of the excavation is located on the surface or underground.

mining system in which the mined material is extracted across a horizontal plane, creating horizontal arrays of rooms and pillars

reinforcement of structures using two diagonal supports which intersect

raise is a shaft in a mine which joins two levels by definition mined upwards

Salt-concrete (or salzbeton) is a building material that is used to reduce the water inflow in mining shafts in salt mines. It is composed of 16% cement, 39% halite, 16% limestone powder, 14% water and 15% sand.