While my knowledge base doesn't contain a specific fatality investigation report for mine accident 2525, I can provide general safety regulations and prevention measures based on similar construction and confined space incidents.

In construction machinery-related incidents, a significant number of fatalities involve both equipment operators and workers on foot. Key prevention measures focus on site setup, equipment operation, and worker awareness.

• Contact local utilities before beginning work.
• Avoid operating machinery on steep grades.
• Position machinery on stable ground.

[1] [1] [1] For equipment operators:

• Train operators in proper equipment use.
• Regularly evaluate safety programs.
• Identify and maintain machine controls.
• Use and maintain safety features.
• Securely latch attachments.

[1] [1] [1] [1] [1] For other site workers:

• Train workers to recognize and avoid unsafe conditions.
• Make workers aware of machine swing areas and blind spots.
• Review communication signals before each shift.
• Keep workers outside of swing areas.

[2] [2] [2] [2] Additionally, the majority of machine operators killed were not wearing seat belts or occupant restraints. [3]

Confined spaces also pose significant risks.

• Recognize confined spaces.
• Test and evaluate the atmosphere before entry.
• Continuously monitor the space.
• Establish rescue procedures.

[4] [4] [4] [4] A high percentage of confined space fatalities occur among would-be rescuers, so a well-designed and properly executed rescue plan is crucial. [5]

These recommendations emphasize the importance of training, proper equipment maintenance, and adherence to safety protocols to prevent fatalities in both construction machinery and confined space environments.