MSHA Publishes Proximity Final Rule
The phase-in periods are based on the
availability of the four currently MSHAapproved
proximity detection systems,
the estimated number of continuous mining
machines that must be rebuilt or
replaced by new machines during these
periods, and manufacturers’ capacity to
produce and install these systems. To
meet the standards set in the rule, a
proximity system must:
• Cause moving or repositioning continuous
mining machines to stop before
contacting a miner;
• Provide audible and visual warnings
on the miner-wearable component and
a visual warning on the machine before
it stops;
• Provide a visual signal on the machine
that shows the machine-mounted components
are functioning properly;
• Prevent movement of the machine if
any machine-mounted component is
not functioning properly (except limited
movement for repairs);
• Prevent electrical interference that adversely
affects the performance of other
electrical systems in the mine; and
• Be installed and maintained in proper
operating condition by a trained
person.
A list of approved systems is available on the agency’s website: www.msha.gov. According to historical federal data, there have been 35 deaths where U.S. coal miners have been pinned, crushed or struck by continuous mining machines in underground coal mines since 1984. Based on manufacturer information, nearly half of the continuous mining machines in operation—425 of approximately 863—are already equipped with proximity detection systems. Most will meet the provisions of the final rule with only minor system changes, such as adding warning signals.