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Safety Tip: Add a strap, cable, or bolt support for roof beams
Two miners died recently when a false roof collapsed on them. The roof beams had been supported by rails hitched into the ribs. When the ribs sloughed-off over time, the hitched rails could no longer support the structure.  Another dangerous situation can occur if the posts that are supporting beams become dislodged, such as being struck by a haulage vehicle.
Collapse of roof beams can be prevented in these situations by running straps or suspended cable supports under the beams, or by bolting the beams.
By adding these types of supports, the roof beams themselves will not create a falling-material hazard if the posts (or coal ribs) supporting them are inadvertently dislodged.
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Mine Safety and Health Administration (MSHA) 1100 Wilson Boulevard, 21st Floor Arlington, VA 22209-3939 |
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