Day opening

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In the miners' language, all accesses to a mine from the day into the mine building ( underground ) are referred to as day opening . Depending on whether the route to the mine is horizontally via a tunnel or vertically via a shaft , a distinction is made between tunnel mouth and shaft opening .

Individual evidence

  1. ↑ When the earth suddenly breaks open - the facts about the daybreak , derwesten.de , February 1, 2013
  2. ↑ Mundloch , mineralienatlas.de
  3. ↑ Additional offer from the slate exhibition mine: Raumländer prepare pit path , Siegener Zeitung , April 16, 2016