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Headframes

A headframe(also known as a gallows frame, winding tower, hoist frame, pit frame, shafthead frame, or headgear) is the structural frame above an underground mine shaft. Modern headframes are built out of steel, concrete or a combination of both. Timber headframes are no longer used in industrialized countries, but are still used in developing nations. Traditionally steel headframes are used when a drum hoist is employed, and concrete headframes are built for friction hoists, however a steel headframe can be used with a friction hoist for shafts with a smaller capacity and depth.

From Wikipedia, the free encyclopedia (version june 7, 2012).

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  • Shooting date : 07/01/2012 14:32:06 (Europe/Brussels)
  • exposure mode : Auto
  • custom rendered : Normal
  • scene capture type : Landscape
  • scene type : Directly photographed
  • orientation : Horizontal (normal)
  • original image height : 3264 px
  • original image width : 4928 px
  • sensing method : One-chip color area
  • metering mode : Multi-segment
  • exposure program : Aperture-priority AE
  • focal length : 17mm (cadrage équivalant : 26mm)
  • lens : Sigma 17-50mm f/2.8 EX DC OS HSM
  • ISO sensitivity : ISO 100
  • aperture : f/7.1
  • exposure speed : 1/125 (0.008 sec)
  • camera : Nikon D7000
  • exposure compensation : -2

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Document created the 31/01/2014, last modified the 27/09/2024
Source of the printed document:https://www.gaudry.be/en/photos/set-collieries-and-coal-mines/263560120036071781264002.html

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