MSHA rewrote four underground coal rules in June. The belt rule matters most.

WASHINGTON — On June 25, the Mine Safety and Health Administration published four final rules under its 'Improving and Eliminating Regulations' heading, covering approved conveyor belts, blacksmith shops, diesel particulate matter emission limits and permissible flame safety lamps in underground coal mines.

Three of the four touch equipment most crews see rarely. Blacksmith shops are a handful per district. Flame safety lamps survive as a backup method of gas detection on some operations, but the electronic detector is the working instrument. The diesel rule adjusts emission limits most operators meet with filter and maintenance programs already in place.

The belt rule is different. A conveyor is the longest continuous piece of machinery in a coal mine, it runs the length of the travel route, and it is where miners die. Two of the most recent deaths in MSHA's 2026 file were belt deaths: a miner caught at a tail roller in October, and a miner cleaning material from troughing rollers in September.

That is the practical read for an operator: whatever the rule text says after the revision, the control that keeps a belt from killing somebody has not changed. Guarding at the tail and take-up, a visible and locked disconnect before any work near a moving belt, and a belt-walk done with the belt stopped.

MSHA's regulatory agenda lists nine underground coal items in the same family, from hazard communication to foam generator systems. Expect more revisions, and expect the ones that matter on the section to be the ones about machines that move.

Read the four rules themselves: they are short, and the preamble tells you what the agency thinks the risk is now.