A. Except as provided in § 45.2-728, there shall be at least two travel ways, entries, or openings to the surface from each section of a mine worked. Each longwall panel shall be developed with at least three entries; however, if new technology becomes available pursuant to which a two-entry system can be safely developed, such technology may be used, with the approval of the Chief.
C. The first opening shall not be made through an adjoining mine. The second opening may be made through an adjoining mine.
D. One of the required travel ways shall be designated as the primary escapeway and shall be in an intake airway.
E. Any surface structure where miners congregate or where the mine map or other official records are kept at the mine shall be offset at least 15 feet from the nearest side of any mine opening or otherwise located to be out of the zone of danger if an explosion occurs, unless otherwise approved by the Chief.