A. All underground active workings and travel ways shall be secured and controlled to protect miners from a fall of roof, face, or ribs. Loose roof and any loose or overhanging ribs or face shall be taken down or supported.
B. The mining method that the mine operator follows shall not expose any miner to a hazardous condition caused by the excessive width of a room or entry, a faulty pillar-recovery method, or any other hazardous mining method or working condition.