What is the maximum distance outbye from the face specified for distribution barriers?

• A. <100 m
• B. <30 m
• C. No distance specified
• D. <200 m

Answer: (A)

Distribution barriers are electrical safety barriers placed to control and quickly isolate power to the face as it advances. The rule specifies that these barriers must be no more than 100 meters outbye from the face, so they stay close enough to maintain a protective, energised portion of the electrical system within a manageable distance and keep a safe, shielded zone for workers and equipment ahead of the barrier. If the barrier were placed farther than 100 meters, power could remain available in the face area longer than is safe, making rapid isolation harder and increasing the risk of ignition hazards or electrical incidents. A distance like 30 meters would be unnecessarily restrictive for typical mine layouts, while 200 meters would exceed the regulation and leave too large an unprotected area. Not having a specified distance would ignore regulatory safety requirements.