Under the rule, the proximity detection systems need to be installed on underground coal hauling systems used on the mining section.
Proximity detection is a technology, which take the help of electronic sensors to detect motion and the distance between a miner and a machine.
The systems hold capability to provide audible and visual warnings, and will automatically stop moving machines, when miners are injured.
MSHA’s administrator for Coal Mine Safety and Health Kevin Stricklin said: "We know this technology works as a number of mine operators have already installed proximity detection systems on coal hauling machines and scoops.
"We hope to learn from their experiences during the public comment period."
The systems will provide a visual signal on the machine that indicates the system is functioning properly and prevent movement of the machine if the system is not functioning properly.
It will also help to stop a coal-hauling machine or scoop before contacting a miner and prevent interference with or from other electrical systems.
According to MSHA, around 155 of the approximately 2,116 underground coal hauling machines and scoops have been installed with proximity detection systems, as of June 2015.
Image: A shuttle car transports coal in an underground mine. Photo: courtesy of US Department of Labor.
