Never Go Under Unscaled Roof Try to look from several angles without positioning yourself in a dangerous area to do so. Look for scaling tracks on every square foot of roof, ribs, and face. Ledges Loose rock can be present on ledges. Ledges indicate a section of layered rock. Ledge lines may be difficult to see, or look different from different angles.
Ledges are an area that pose a rock fall hazard.
The area was not properly marked or barricaded. Lack of knowledge. To take a shortcut to another area. To save time. The miner has never seen the results of a rock fall.