SMEE News The Selby Coalfield PART 2

Continued from p.597 M.E.4754 October 18 Coal extraction was by the long wall retreat method. For this highly mechanised form of mining typically two roadways are driven from the main roadway to the back of the area of coal to be extracted. A cross tunnel is driven to form the face. Ventilation is supplied down one of the roadways and back up the other with the face roof being supported by hydraulic roof supports capable of ‘walking’ forwards. Coal is removed from the face by a moving coal cutter with a rotating head containing ‘picks’ which break the coal off the face to drop onto a conveyor (photo 4). Once the coal is off, the roof supports move towards the face taking the conveyor with them. As progress towards the…

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Model Engineer (Digital) - 1 Issue, Issue 4756

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