Safe Routes Through Stairwells Assa Abloy
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Safe blasting distance for communication towers
MSHA has approved in ERPs a separation distance of up to 50 feet between components of communication and tracking system and blasting components when the mine operator was unable to specify a safe distance based on manufacturer's recommendation. This PPL provides guidance concerning minimum safe distances necessary to prevent interference with blasting circuits by electromagnetic waves produced by Radio Frequency (RF) from communication and electronic tracking systems. a fixed station units in UHF, 450- to 460-MHz range. 8- to. This work is reported in "RF Hazards to Blasting Caps in Coal Mines. PPL P11-V-13, Guidance for Compliance with Post-Accident Two-Way.
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