Regulation 130(1) A pillar shall not be removed if the removal will cause interruption of the communications in the workings between two or more shafts, adits, tunnels or outlets.(2) Pillars required for the support of and between shafts, adits, tunnels or outlets shall not be removed so as to cause an interruption in the case of the shafts, adits, tunnels or outlets but where a mine is to be closed or abandoned the Chief Inspector may approve the removal of pillars under conditions that the Chief Inspector considers appropriate.