- ▁and ▁merge ▁with ▁the ▁Queen ▁Louis a ▁Mine . ▁Gu ido ▁and ▁Railway ▁were ▁deep ed ▁to ▁ 3 2 0 m , ▁the ▁ 1 7 0 m ▁had ▁been ▁worked ▁out . ▁In ▁ 1 9 1 2 ▁the ▁Gu ido ▁mine ▁was ▁merged ▁with ▁the ▁newly ▁built ▁Del br ück ▁mine ▁( M ak osz owy ▁Co al ▁Mine - post ▁ 1 9 4 5 ) ▁and ▁c oking ▁plant . ▁S iles ia ▁was ▁partition ed ▁in ▁ 1 9 2 2 , ▁and ▁the ▁Del br ück ▁mine ▁( with ▁“ Gu ido ” ▁mine ) ▁was ▁made ▁over ▁to ▁Pr uss ian ▁Pre uss ag ▁min ing ▁company . ▁In ▁ 1 9 2 8 , ▁the ▁Gu ido ▁sh aft ▁was ▁closed ▁down ▁and ▁the ▁Railway ▁sh aft ▁became ▁transport ing ▁sh aft ▁for ▁the ▁crew ▁and ▁materials . ▁ ▁Museum ▁The ▁under ground ▁museum ▁is ▁ 3 2 0 m ▁beneath ▁the ▁surface , ▁with ▁a ▁second ▁level ▁representing ▁a ▁ 1 9 th - century ▁mine ▁at ▁ 1 7 0 m . ▁ 3 2 0 m ▁makes ▁it ▁the ▁deep est ▁visitor ▁mine ▁in ▁Europe . ▁It ▁explo its ▁the ▁black ▁coal ▁ve in ▁of ▁No . 6 2 0 ▁coal ▁se am ▁It ▁has ▁on ▁display ▁an ▁Al p ina ▁t unn elling ▁machine , ▁AM ▁ 5 0 ▁long wall ▁cut ter - loader . ▁the ▁ 2 5 0 ▁t onnes ▁coal ▁containers , ▁the ▁convey or