Secondary exit from underground

(1) Where an underground mine has been opened by means of an adit, tunnel, or shaft, a second auxiliary exit shall be provided prior to production and this second exit shall be at least 30 meters (100 feet) from the main entrance to mine and separated by solid strata. Ladders in escapeway. (2) The main auxiliary exit shall be equipped with substantial and well maintained ladders to provide proper access from the deepest working area to the surface. Stope second exit. (3) Before stoping is started, a second exit shall be provided to the stoping block.