Industry litigated; the agency folded. When the regulated entity effectively sets the regulator's enforcement posture, that's regulatory capture in its purest form. Note the irony: an administration rhetorically committed to coal MINERS is acting on behalf of coal OPERATORS.
Coal miners in central Appalachia are suffering from the highest rates of black lung in 50 years. This comes after Trump cancelled regulations limiting toxic silica dust in mines, which would have prevented at least 1,067 deaths and 3,746 black lung cases.