MSHA: On October 16, 2017, a miner was loading haul trucks when the cab of his excavator was struck by material falling from a 65-foot bank failure. The miner was not injured.
• Operate excavators with the cab perpendicular to, and swinging away from, the highwall.
• Train all persons to recognize adverse conditions and environmental factors that can decrease highwall stability and understand safe job procedures to eliminate all hazards before beginning work.
• Examine highwalls and material piles from as many perspectives as possible (bottom, sides, and top/crest) while maintaining the safety of the examiner(s). Look for cracking, displacement, or other signs of distress.
• Maintain safe access to the top of highwalls so that thorough examinations can be conducted.
• Perform supplemental examinations of highwalls, banks, benches, and sloping terrain in the working area during and following inclement weather.
• Immediately remove all personnel exposed to hazardous ground conditions, barricade and post signs to prevent entry, and promptly correct unsafe conditions.
• Use mining methods that ensure highwall and bank stability and safe working conditions. Avoid undercutting and/or oversteepening of the highwall or bank slope. Mine only material that freely flows down.