The Mine Safety Health Administration (MSHA) reports there are close to 250,000 miners work in 12,000 metal/nonmetal mines, and 83,000 miners work in 1,200 across the United States. In these operations, 27 fatalities occurred in 2018 – the second lowest number ever recorded. 18 fatalities occurred at surface operations, 9 fatalities took place at underground mines.
See the report here: https://www.msha.gov/news-media/press-releases/2019/01/09/us-mining-fatalities-2018-were-second-lowest-record
13 deaths or 48% of the 2018 fatalities were caused by powered haulage. Learn more about MSHA’s Powered Haulage Safety Initiative here: https://www.msha.gov/news-media/special-initiatives/2018/05/31/powered-haulage-safety-initiative