Twenty-two miners were killed in accidents during the first half of 2014, compared to 18 for the same period last year and 19 in 2012.
The U.S. Department of Labor's Mine Safety and Health Administration on Monday released its mid-year summary of fatal accidents. The report shows eight coal miners died in the first half of the year. Fourteen workers in other types of mines — including gypsum, silver and gravel — were killed.
The accidents included miners who were pinned or crushed by heavy equipment. Others fell or were struck by falling objects.
Assistant Secretary of Labor for Mine Safety and Health Joseph A. Main said in a statement that the fatalities are preventable. He said the deaths should serve as a wake-up call to "keep safety at the forefront."