Federal regulators issued 199 citations during impact inspections of U.S. mines in November.
The U.S. Mine Safety and Health Administration conducted the inspections at 10 coal mines and six metal and nonmetal mines.
The agency said Monday in a news release that it ordered the shutdown of belt lines at Regent Allied Carbon Energy's No. 2 mine in Wise County, Virginia, and issued 28 citations, along with seven orders. Federal inspectors found accumulations of combustible coal, coal dust and coal fines in violation of the mine's ventilation plan.
The agency says the mine also lacked adequate fire and dust suppression.
The impact inspections began in 2010 after the Upper Big Branch mine explosion in West Virginia killed 29 miners.