CHARLESTON - Follow this link for a pre-publication copy of a proposed rule that the Mine Safety and Health Administration published October 2 regarding the installation of proximity detection system on underground mining equipment.  Also available at this link is a fact sheet that the agency has prepared.  Comments on the rule will be accepted through Dec. 2, 2015. Under the proposed rule operators of underground coal mines would be required to install proximity detection systems on mining equipment, coal hauling machines and scoops on working sections using continuous mining machines.  Consistent with the proximity requirements for continuous mining machines the proposal indicates that the final rule will be phased-in over a period of 8-36 months depending upon the date of manufacture and installation of proximity technology in advance of the final rule.